So I'd seen the first two videos months ago and thought they were kind of cool but not all that great. But tonight I just saw the head-tracking video for the first time.
WOW! That is impressive!
I think artists like Nudone may be interested in the Whiteboard capabilities --> Turn your wall into a virtual canvas.
Or with head-tracking you could even turn your wall into a virtual window. Find a nice live feed of a beach in the tropics and get the image set up to work with this software...