Out of all the posts I read, I think the one who said, "Nobody woke up a decade ago and needed to carry around 2,000 songs" has it the best.
If Apple isn't releasing some iPod/MacBook hybrid device, it's gonna be a huge hit to all of these people telling us something's up. So I'm assuming some sort of tablet device is on the way.
What none of us know is what I saw mentioned elsewhere - what's the killer app? My best guess about what this device could be is the Kindle DX. But it's only made for reading books. Viewing eBooks on a tablet would be pretty much a must, especially if Apple can work out Kindle compatibility.
But then what? Well, if this device is really some sort of hybrid, imagine a thin flip-out keyboard and some sort of stand. This could be the perfect device for student use. Basically a low-powered MacBook Air combined with a Kindle. You can use it one way as a notebook and another way as a tablet. Amazon and/or other providers get textbooks into the electronic format and create a huge new industry.
I just saw a bit on "Today" talking about weight distribution on kids backpacks. Books are HEAVY, especially as you get to high school and college. If Apple were to make this device as above and publishers got aboard, you have a textbook-replacement device. Charge about half price for the eBooks, and you will save paper, money, backs, space, etc.
Apple and others could start pushing this into a few schools, probably universities, and then move on down to lower levels if successful. I have the Kindle app for iPhone, and I can see the huge benefits just the Kindle gives readers if its screen is as good as advertised. Apple's doesn't need to be as good, but something close could change reading.
Oh, and as someone who gets money working at a newspaper, this could really boost our bottom lines. Bigger publications already go on Kindle. If there's some easy way to get the smaller papers out in such a format (check out USA Today's e-edition), it could give us life. It's kinda what rumors say Apple is doing with the music industry in that "cocktail" application.