Liudr, this sort of reminds of that a TED video I saw about a guy hacking the wii IR camera/controller. One of his experiments was attaching some IR lights to safety glasses and using that as a head tracking headset - and here's the cool part - he used it in some software that moved the perspective of a 3d image in such a way that it made the illusion that it was actually 3d (looked realistic too).
Here's the vid:
http://www.ted.com/index.php/talks/johnny_lee_demos_wii_remote_hacks.html