This is awesome. Any screen that has a browser (internet enabled...phone, computer, tv, etc.) can be synced to your iPhone or Android phone and, poof! The phone becomes a remote control to select, play, and operate any video on the slave device.
Control Kahn Academy videos from across the room. As great as this is, just think of where it's going to go in a few months!
Oh, and it's free. -JL