Re: 3D UI yes... useless crap VR headsets NO! JUST NO !
@ Deltics: damn you, now I have THAT SONG in my head for the rest of the day!
FWIIW, we're in a virtual reality all the time anyway. Our sensory perception lets us sense only a fraction of all there is (visible light spectrum, hearable audio spectrum, perception of time, etc), and through a barrage of filters too. Then all of that data is assembled into some kind model that relies heavily on cultural condition and brain chemistry, to name but two factors.