Re: Glasses anyone?
For driving sims it absolutely does give you an "edge" and is certainly not a gimmick; speed sensation, immersion/sense of presence, depth perception and "feel" of what the car is doing under you are all greatly increased, allows you to more easily position the car exactly where you want (or be able to tell by just how much you missed that apex).
Before the Oculus arrived I was using high end triple screens in my sim rig, they haven't been used for almost two years now