I might be wrong, of course, but I predict that the VR headset for video games will be big flop, exactly like the 3D TV was. Yes, it's thrilling, and exciting, but I am skeptical.
First of all, like for 3D TV, lots of people will not perceive the stereoscopic effect as they should.
Secondly, a virtual reality headset requires computers/consoles to render two different images, meaning it requires twice more computing power. Or, it will result in lower quality rendering. Let's face it, the PS4 or Xbox One already have difficulties to output a full HD image, so how could they render twice more images per seconds ?!
Also, will you really want to move your head all the time, to look around you while you are playing? Won't it be quickly become uncomfortable, and painful?
And my last point, is the cost. Is it really interesting to spend $700 in a VR headset, plus the cost of a monster PC to run something at high enough quality? Better invest into a good screen, and a good computer.
So to me, this will just be a temporary fad, that will soon be ranked among the gadgets , exactly like 3D TV.