Jeremie Francone and his advisor Laurence Nigay from the Engineering Human-Computer Interaction group at Grenoble Informatics Laboratory in Saint Martin d’Hères, France have created a demo that incorporates head tracking along with the gyroscope in the iPad and iPhone to implemented a 3D view without the annoying glasses.
Watching the video (attached below) shows that the effect is very impressive, especially with theholodeckesque background. While I’m sure this technology took quite a bit of work to develop, this is the type of thing that I’d hope would be converted into a simple widget for other visualization apps to take advantage of.