Here's the precious list of GS4 features (things the GS3 can't do):
Air Gestures: Refers to hand movements made above the phone's display, without coming into contact with the display, that controls the phone. Common gestures include waving your hand over the display to skip a track or waving left and right to switch between open web pages in the browser. These gestures only work with specific Samsung apps.
Only works in certain Samsung apps. The ONLY application I can see is if you have dirty hands and want to see something on your screen - otherwise, hovering your hand over the screen seems much more cumbersome than simply typing on it.....this tech is better suited for like an "Iron Man" table or window.
Air View: Like the stylus on the Galaxy Note 2, you can hover over the display with your finger to view information about certain pieces of content. For example, hovering your finger over an email shows you a longer preview without opening the message; hovering your finger over a date on the calendar shows you a quick view of what to expect on that day.
Again - same as the first. I can either hover my finger over an email and wait for it to detect the finger and show me a preview, or just tap the damn email.....
Drama Shot: Camera feature that shoots 12 photos at once and shows you a time-lapse of all the action in those photos combined into one picture.
Ok? I'm sure there's someone out there who thinks this is cool....I'm also sure there's an app out there that does this already - plenty of time lapse apps on both app stores.
Dual Camera: Activates both the rear camera and the front camera, so that the photographer can superimpose himself or herself into the subject of the photo. Samsung gave as an example someone watching football superimposing himself or herself into the game.
At first I thought this was going to be really cool - but the application of it let me down. When they started talking about it I expected the front camera to take the photo of you and ACTUALLY put you in the photo, but instead your head is put in a bubble in the corner....worthless
Dual Video Call: While video-chatting with someone, you can show them both your face and the view from your rear camera while you chat.
Ok? Wonder how much battery drains using both cameras to shoot video at the same time takes....seems pretty worthless to me.
Group Play: Allows multiple Galaxy S4 owners in close proximity to join a private network in which they can, among other things, play a game.
Gamecenter - though I suppose I could see some benefit in creating an ad-hoc network if you don't have reception and want to play with all your GS4 friends who are within 10 feet of you.....
S Health: New app that acts as a fitness tracker and food diary. The Galaxy S4 has a built-in pedometer to count your steps, and you can take photos of your meals each day to keep count of your calories and eating habits. Samsung will also sell a fitness bracelet, a digital scale and fitness belt to measure blood pressure, pulse, glucose levels and weight for those interested.
Like this hasn't been done a billion times with countless apps and accessories...
S Translator: An app in which you can input any of 10 languages and receive a translation, either spoken or in text. Also works to translate text on your email, text messages and a few other Samsung apps.
Google Translate.
S Voice Drive: New hands-free function for drivers that allows the driver to operate the phone with his or her voice.
Siri.
Samsung Adapt Display: The Galaxy S4 "learns" what you are viewing and adjusts the display's brightness accordingly. If the phone senses you are reading an article, for example, it will illuminate from a more muted brightness.
Auto-Brightness - most of the apps on the iPhone do this for you already (the Kindle app has its own brightness settings, Passbook will illuminate to max for the best possible scanning environment.
Samsung Adapt Sound: Similar to Adapt Display, your audio can adapt to the content you're listening to (video, music, etc.) and optimize itself to that content.
Optimize itself to what IT thinks I want to hear.....but not necessarily what I want....does no one else see this as LESSENING choice? (I realize I can always turn these features off....)
Samsung Optical Reader: Camera feature that can snap a photo of a business card and import that information into a new contact in your phonebook. Was not working as of demo time, but Samsung reps assured me it would be fixed by the time it shipped to consumers.
The one feature that seems useful didn't even work during the demo....this isn't some crazy new tech - simply a software implementation which likely can be done through an app on another phone (Apple added redemption of gift cards via the camera on Macs recently)
Samsung Smart Pause: When watching a video, the front camera can sense when your eyes move away from the screen and pause the video automatically if you aren't looking.
So is the front camera on the whole time? Battery drain? Is it that hard to press a pause button? What if I don't want it to pause when I look away?
Samsung Smart Scroll: When you are reading an email or article on the web, you can scroll up and down by tilting the device up and down rather than swiping with your finger.
this one takes the cake.....so instead of swiping, I can tilt the phone to scroll.....REVOLUTIONARY!
Samsung WatchON: A built-in IR sensor lets you control your television set with your smartphone. Comes with a standard remote and a program guide depending on your cable provider. Can also control certain cable boxes and DVD players.
HTC One does this (I believe HTC has had this feature in their smartphones for a while - among others).
Share Music: When linked with Group Play, multiple Galaxy S4s can work as surround sound speakers, all playing the same song at once.
Ahh so here's the "surround sound" cell phone speakers....lol
Sound & Shot: Allows you to record up to nine seconds of audio at the time of taking each photo.
HTC One has this as well - among others.
Story Album: Templates that allow you to create a digital photo journal or scrapbook from a certain event. You can also then order and print out that story album for a fee.
My HP printer can do this for me....I don't think anyone is arguing this is innovative - just happened to be on the list I found.
_________________
The best part about most of these features is the fact that most of this stuff only works with other GS4s or with specific Samsung apps....talk about limited. You want to jump all over Apple for having a "proprietary cable" or for locking down their features - Samsung is doing EXACTLY the same thing....
I can say with 100% certainty, I have absolutely ZERO desire for ANY of these features to be built into iOS 7 or the iPhone 5. If they are, they better be easily turned off and not bog down the OS....I prefer choosing the software that goes on my phone (via apps) rather than the OS coming pre-loaded with all this nonsense.
How much space does TouchWiz take on a device? Say I bought a 16 gb GS4, how much of that space would be usable for me? (I know all about sd cards....I'm talking on the phone storage).