I think they will introduce a touch-screen Shuffle-like iPod but they will eliminate the shuffle. iPod Touch with FaceTime and FM Radio is a must. Blow up the Classic and improve the Nano's video capabilities. New MacBook Air also.
If the new 3mm^2 screen is the new control instrument... I could see a nano that combines that with the Nano's screen, for a new nano.
I couls see just the 3mm^2 screen controls, with basic info display as a successor to the shuffle, more like the previous one that still had surface controls.
iPod Touch should get FaceTime, FM, Bluetooth, Accel+gyro, (I'd like GPS+Compass, as well), plus two cameras like iPhone, to clobber FlipVideo and others. It should also be a new mini iPad, by name, as that is it's closest functional similarity.
MacBook Air should shrink MacBook into a near-netbook size, with a nice aluminum feel, and should be priced just above iPad, and just along-side MacBook.
It would almost make MBA, MB, and MBP 13 nearly redundant between the three, where perhaps two could work better. MBA 11-12 and MBP 13.
iPad 5-6", iPad 10", MBA 11-12" and 13.3-14", MBP 13", 15", and 17" would be a fairly solid lineup from 300$-3000$