@thomasfuchs I could see that, but it would present an interesting dilemma. Presumably you would want landscape 3D for rear photos and video, but facetime is portrait. So the display would need to be capable of 3D in both axis (I'm not aware of any device or development capable of that).
Maybe just facetime could be done with 3D cameras and then use the tracking to fake a 3D display à la Johnny Lee Wiiimote tech demos: https://www.youtube.com/watch?v=LC_KKxAuLQw