This is Alpha Range, it’s an iOS game that plays like a Space Invaders or Asteroids-type game, according to Engadget, which got some hands-on with it.
It probably won’t work out for most people, really. You need a projector and a Tripod. You will also need a laser pointer. The game itself will also cost you $8 on the App Store, which is a bit more than the average game.
The good news is that they said it is very addictive. Then again, we can buy an Xbox 360 for quite a bit less than what all this stuff would cost us. It looks neat, though. In all truth there are probably better applications for this piece of tech, such as presentations.