I'd call it "support" in the same way that I'd call my Dirt3 mode "support" (which is basically exactly the same thing
) in that it supports head tracking and warping, but it's not stereo 3D, the view is duplicated and projected at infinity.
For flight and driving sims this is a passable experience, because most of the things are far away out the window anyway, and a lot of the immersion comes from just having fast head tracking and a wide FOV.
Hopefully we will get proper stereo 3D working with Virieo in Dirt and FSX soon though
For future reference look for the Rift head tracking at the OpenTrack project instead of FTNOIR, it's forked and my Rift plugin was in the branch that the developer wouldn't merge into 1.8 and as such was forked off (the branch with cross platform windows and linux support)