AzaK said:Not necessarily. Once the u pad is calibrated then the gyros/magnetometers etc would enable it to be able to tell when you are holding the thing up to the tv and looking through it like a window. You dont need IR for that, although actual IR would probably be more accurate and impervious to drift. In this case though you'd need the IR camera on the bottom if you wanted that window functionality.
Good point about the camera location. Hmmm. The thing is, I'm not sure I buy that it's precise enough to get the effect I imagined from the description without an IR camera.