See some great demo's with mini projector/camera set-ups, would be excellent.
I was thinking about similar things, but wondering about real budget ways to do it.
So far I was thinking a few IR proximity sensors to mimic a basic dpad/mouse plus two action buttons, would be enough for menu driven interface.
As for display...driving a LCD Alphanumeric display but would be nice to project it somehow though (would need to take it apart without it breaking to put a suitable backlight on).
Otherwise, possible to use some persistence LED (POV) type trick, but would need some way for it to move it etc. Still that's all the fun!
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