This is an intriguing idea a sort of wearable computer idea that seems like an in world implementation of augmented reality with a gestural control system
It comprises a camera a projector a mirror then coloured finger covers using a mobile phone for computation and internet connectivity
the camera scans the world for things it recognises and then the projector is used to then project information onto things in the world. So it picks up books and adds their amazon rating. You can hold up a hand and get a dial keypad or draw a watch hold up a boarding pass and it'll project onto the pass if the flight is delayed or if the gate changed etc.
The video associated with this shows the thing in action and it's a very interesting concept.