I recall it having a whole helmet thing, not just goggles, and it was motion controlled because it picked up when you turned your head or looked up and down, and they also had a gun type device that might also have had it's own motion control. It was awesome. I don't know what the game was that they had on, but it was sort of Doom 1 type graphics (about the same time).
I also remember seeing someone there who had a cell phone. That was pretty amazing too in those days.
The demo I saw at Kyalami was playing Hexen.
The gun they had there was only for "show" and not ready for use... they said they're still working on it or something.
The helmet's motion control viewing was definitely the highlight of the motion detection!