Here are some other things I remember about the VR-920.
The head tracking worked, at least with the AH version of the time, but it doesn't use a centering focal point like TrackIR does, but some sort of internal magnet or gyro thing or something.
It didn't seem real consistent.
The 3D wasn't especially impressive and contributed to a bit of a shaky screen.
I considered removing the earpieces and mounting it in a helmet or something on a hinge, disable head tracking and use it in conjunction with TrackIR.
That way you could run it in clone with your monitor and if you needed to read text you could flip it up out of the way.
The 3d mode gives a blurry double image on the cloned monitor but I think you can use a hotkey to quickly disable and enable that feature in game.
I wish it hadn't gotten damaged, I really did want to mess with it some more.
Emagin offers one called the Z800 I think. It uses OLED screens instead of LED and even though the native resolution isn't much different, some say it looks a lot better, but then some say it doesn't.
I don't believe it has support for AH so you wouldn't be able to use the native head tracking or 3D without an add on like glovepie which may or may not still work.
Plus it costs about 1500 bucks!
Vuzix is supposed to be coming out with the VR-1440 with much better resolution, but they mentioned that close to 2 years ago and nothing since.