Having just received my 11", I have the following opinions on form factor.
iPad Mini (7.9")
iPad Mini is still the ideal tablet only form factor for me. It's like the tricorder or futuristic PDA in Hollywood ... big enough to show you a relatively large UI or web page and still small enough to put in a jacket pocket. It's incredibly easy to one hand and poke at ... and two handed thumb typing in portrait is quick and comfortable as well. If the Mini ever gets the bezel-less treatment, I hope they keep the screen size and decrease the bezels. That would be perfect. I thought it got just a bit too tall when they went from the Mini 3 to the Mini 4.
iPad Pro (11")
The 2018 11" is only slightly larger than the 9.7's I used back in the day, but it feels clunkier in practice as a tablet. Part of that is due to the "swipe home" gesture ... because the screen started further up the tablet on the older models, it was easier to access the bottom of the screen / hit the home button. Now, reaching your thumb over across the slightly wider 11" tablet and all the way down to the bottom (in portrait) just feels uncomfortable. I have to reposition my hands all the time to do it. Therefore, as a tablet, I would have again preferred the form factor to shrink to the 9.7" screen instead of expanding the screen.
However, a big part of the appeal of the 11" iPad Pro is the keyboard and landscape usage. And it may well be that the reason Apple went larger on the form factor is that the keyboard for a "Pro" iPad needs to be a comfortable size. Perhaps they deemed it worth the tradeoff against tablet usage?
I don't have my Smart Keyboard yet, but I tried Jump Desktop with a usb-c hub and keyboard ... and wow. I was really impressed! I can (and did, for half an hour) legitimately do serious work on this thing by remoting to a computer. I think the "cloud computing" piece of this is getting very promising. Definitely going to be experimenting with this more, but my goal for this is to be able to nuke my Macbook from my travel bag with this iPad.
iPad Pro (12.9")
If you are going to "laptop" around the house, it's the form factor that gets the most done IF you don't mind the extra size. The 12.9" is simply too unwieldy for normal tablet usage ... keyboard and landscape usage is practically mandatory.
As a laptop replacement, there are still a lot of questions. Around the house, if you truly need to be productive, most people would be fooling themselves using a 12.9" iPad instead of a real computer attached to some sort of big screen. On the go, I think it comes into its own a bit more, but still has limitations. That puts the 12.9" into a situation where it's less useful in the general case and more reliant on specific uses to justify its existence ... such as anything involving drawing, sidecar with a Mac, a portable note taking adjunct to a primary Mac, etc.
It's hard to articulate this, so I guess I'll just talk about how I ended up using my 12.9" when I had one.
- On the go
- I'd often throw my 12.9" iPad in my bag for a day trip where I'd probably be sitting at a table for a while. Both a normal size iPad vs a 12.9" iPad fit perfectly well in a backpack, so why not take the bigger one if it's going to be stationary? I'd often avoid the Macbook for a day trip if I didn't need it because it isn't as energy efficient, the trackpad is less ergonomic, and the always on LTE of the iPad is vastly easier to work with.
- On longer trips, I ended up leaving the iPad behind. It didn't fill enough of a niche between my iPhone and Macbook (which I had to have for work) to warrant bringing it along.
- At home
- I'd use the iPad sitting up on the couch or in bed watching TV. Sometimes I'd put it in front of me on the table while I was eating.
- I would avoid using it lying down, on my side in bed or on the couch because it was just too large. I would never use it in portrait mode ever.
- I never did real work on the iPad at home. It couldn't run real apps or multitask/web browse with anywhere close to the efficiency of a full workstation ... which I work at all the time. So I'd end up gravitating back to my computer a lot.
- Signing documents was sometimes useful, but I don't think it was often enough to make a difference.
At the end of the day, the niches I found the 12.9" to be useful in just weren't that compelling for me. It wasn't really a great device for lounging around ... you have to always "be at attention" like any laptop. There were definitely SOME areas I found myself reaching for the 12.9" vs other devices, but it was a lot of disposable income for those tiny gains around the house or on the go.
What's dropped me back into the iPad ecosystem again is full mouse/keyboard support for Jump Desktop and the great refurb prices on 2018 iPad Pro's. The price/performance situation has improved enough that I'm going to give everything another shot.