That's Redditor silverlight using a combination of blank playmat and a video projector to make the ultimate tabletop gameplay experience!

Photojojo has devised an awesome way to turn your phone into a mobile projector screen.

"Basically, you start by cutting a hole out of one side of the shoebox to match your magnifying glass and taping the glass on the box. Then you make an iPhone holder from a paperclip, flip the screen display on your phone (to account for how images passed through a lens get flipped), position your phone inside the box (playing with placement until you get the clearest image), put the box top back on, turn the room lights down low and the brightness on your phone up high, and revel in your resourcefulness. Doesn't get more accessible than that!"

Courtesy of Music Fails!