That is definitely incredible, really good stuff there.
Head-tracking VR was awesome, I used a few home models myself in 2000, but it was very low-end stuff, only Quake 1 would even run on it. But it WORKED, it was just too expensive to really market.
Nowadays it's far less about the goggles and more about improving the ability to interact with the display.
That head-tracking interface in top post could easily be fitted onto a pair of e-d glasses (
http://edimensional.com/product_info.ph ... ucts_id=28 ), used on a half-moon display setup (
http://www.youtube.com/watch?v=vq52x6LmUew ), and the result would be some seriously insane VR awesomeness.
If only I had the money, that would be my dream machine.