At UCB each of the big lecture rooms has a touchscreen that controls all the AV in the room. It allows you to switch from one video input to another, to run the DVD player, to raise and lower volume, to raise and lower the video screen, etc. The touchscreen was a sort of super-remote that ran a hardware hub which controlled all of this.

I'd like to have something like that software on a tablet I can carry around. The iPad will already run basic word processing, spreadsheets, play video, etc.