The actual ability to shift images based on viewer perspective is truer 3D than the 3DS, 3D TVs and 3D cinema. Those systems always looked like 2-4 layers of cardboard cut outs with no real depth to individual elements, like a diorama for a school project come to life. I've seen head tracking projects from both individuals and small company prototyping groups, but this is the first I've heard of a commercial product.
Still, 3D is a gimmick in almost every application you can think of. Being able to shift your head to see a different angle of an object is neat, although if you spend the time to code that functionality you can just make the object rotatable by the user. It might work with multi-user situations like advertizing is public places and special effects in amusement parks and fun houses. Even with this impressive tech people are only going to use it the five minutes or so it seems cool. I wouldn't want to contort my wrists at weird angles all the time because that's how a menu or game is controlled.
HalloHerrNoob said:
Also, what happens if I wear (sun)glasses, or it is dark? What if there are more people (would be fun if you could trick the cameras to register one of your eyes and one of the eyes of someone else).
I don't think sunglasses are very infrared transparent, but if it's dark I'd assume it would have a few IR LEDs to illuminate your face without being noticeable to you if the screen didn't provide enough light. Security cameras today have tons around the lens to help see in the dark without giving a robber any light to work with or spot the camera's view. IR LEDs have an ever so faint red glow in the dark that it wouldn't bother anyone looking at a screen right next to the LEDs.