Imho, VR won't achieve critical mass until consumers have machines which can run it. Then it's just a headset buy, rather than the HMD but you need a new GPU and then you need a PSU and oh you'll need a faster proc and more memory etc.....
PSVR is the first tranche of this - if MS adds VR to Scorpio, that'll generate more traction. For now though, there's an awareness of it - it's starting to make in-roads in corporates, but it won't hit mainstream for a while yet. Something like Ready Player One might also push it along in the public's mind (and someone should really make a film version of Snow Crash!).
Anyways - I figure another 2-3 years by which time 1080 capable GPU is effectively entry level.