I suspect that for this price it is nothing more than perhaps an infra-red light source and either one or two IR-cameras. The black surface eludes to this. They probably have some kind of hand model similar to Kinect that allows them to claim such a high accuracy. Problem number 1 that I see is power. Hands are not very IR reflective. It will need a high power IR light source. Thus the images you see of a wireless device are disingenuous. It will need USB connected to function. Reading the FAQ, this is more-or-less confirmed. Problem number 2. Look at the handwriting demo. It tracks movement continuously, but can't tell when the virtual pen is lifted off the paper. Problem number 3. Interfacing with existing operating systems will be diffucult. Yes, you can move a mouse pointer around, or swipe stuff and zoom in. But what about a decisive 'select' or mouse click. How can this work? Basically, IMHO this is, at best, going to be a huge disappointment to all those who purchase and most likely going to be vaporware. So thing twice about that pre-order folks.