Thats what everyone said about the Z800... only, that turns out to be incorrect!
3dvision, I actually started another thread asking if anyone actually has tried the same steps I did to get my Z800 going with 3D Vision on the Headplay, but I haven't really had much response. Therefore, I still don't know if Headplay is, or is not compatible with 3D Vision. I cannot dismiss the possibility that it may well work if it supports a stereoscopic flipping mode, as my Z800 shows up as a generic device. If you have a Headplay already, take a look at my 3D Vision + Z800 thread, and try following the same steps (crucial bit is probably making the Headplay/Z800 the
primary monitor. Please let me know if you have any success, as if you do, I'll buy a Headplay to add to my my VR stable

@ CyberReality: that doesn't seem to be true, at least with the latest Nvidia drivers. Since the Z800 shows a 'generic 3d monitor' mode when connected as a primary, its quite possible that other pageflip display devices will work using this same 'generic' mode.