I like the promise of pico projectors. You can get a much larger viewable image for movie watching, games, or presentations using one rather than a laptop screen. The reality is most of them are not bright enough to be useful in the real world.
Optoma has a new pico projector called the PK301 that is up for pre-order on Amazon. The device sells for $399.99 and you get free 2-day shipping if you pre-order.