it is rumored
that the next iteration of the ipod will feature a nice screen with a 3.5"-touchscreen and a digital scrollwheel.
however cool that may be, i was really impressed by that tech-demo from the new york university here: bi-manual, multi-point, and multi-user input on a graphical interaction surface . it shows how one would be able to interact with an OS/GUI with multiple fingers and two hands. wicked!
you can directly grab the demo reel as a 17 mb .mpg-file or 12mb .mp4-file (both linked in the coral-cache -version to save some bandwidth).