I came across this pretty cool gadget the other day. Basically its a really small projector that uses lasers to project the picture.
Here's a link to some info and a video demo of the product. It think it is a pretty cool idea and if it actually works well I definitely will pick one of these up
http://www.youtube.com/watch?v=7UfarRM0BoM
http://www.microvision.com/pico_projector_displays/