3. The biggest innovation will be the touch interface. They will have a virtual keyboard that works amazingly well, and it will have other amazingly intuitive gestures that it understands. The touch interface will work on both sides of the device so you can wrap your hands around it and make stuff happen that way.
4. Apple will unveil a new cloud that connects all its devices together. The tablet will only cache your information locally, all data and content is stored permanently on Apple's servers. (Apple must learn to be Google and Google must learn to be Apple, though neither ever will.)
6. The new iTouch software will not only run on all the newer devices, but will also run on the Mac. They will demonstrate their app store running on Mac hardware inside the same environment that runs on all the other devices. There will be subtle hints that the old Mac programming model is "legacy" -- where they began -- will always be loved by Steve, but eventually will be deprecated.
8. Ditto for leading publishers.