There's several pico projectors on the market and, ironically, projection of video onto a tent wall might be one of the few satisfactory uses. From what I've read, the image brightness falls dramatically with projection distance and most if not all benefit greatly from a dim/darkened room.

I was looking for such a projector for My Lady who has a collection of movies on her iPod(s). But I eventually concluded the pico projectors aren't yet ready for prime time...

On the other hand, the DLP chip technology at the heart of the projectors makes for superb yet lower cost widescreen HD TVs.

FB