I suspect it's an illusion and that does not represent their true 3d point cloud. It's probably a skinned 3d mesh of a hand which is then moving in sync with the detected hand.
Their webpage suggests they can handle multiple devices connected to the one PC, so I was wondering whether they had another sensor out of shot above the scene pointing downwards.
Actually - scrap that. A better hunch is that it's not structured light at all, but actually an electric field sensor. See this Quora answer (disclaimer, by someone who "knows shit all about this"): http://www.quora.com/Leap-Motion/What-is-the-technology-behi...
Actually - scrap that. A better hunch is that it's not structured light at all, but actually an electric field sensor. See this Quora answer (disclaimer, by someone who "knows shit all about this"): http://www.quora.com/Leap-Motion/What-is-the-technology-behi...