Way back in the day, I saw a VR system running on an Amiga 3000 at an Amiga convention - I think it was at Wayville showgrounds in Adelaide. The thing I remember most about it was that it displayed on the A3000's screen, but the display was backwards. The correct display was on the VR headset.
As I recall, the image lagged motion a fair bit, and they said it tended to make people feel nauseous :-S
I'm afraid I don't remember the name of the package they were running.