Are you sick of squinting at your tiny iPhone screen during long flights? Why not just project the movie onto the back of the seat in front of you. The Pico Pocket Projector ($430) is an ultra-portable DLP/LED projector that measures just 2 by 4.1 by 0.7 inches, weighing only 4.2 ounces. It projects a screen size up to 60 inches on nearly any surface. The Pico also has a rechargeable battery and a built-in speaker (though headphones or external speakers are recommended).