I've long since postulated that I'd absolutely volunteer to 'jack in' to a neural method to control a computer - complete with my standard joke about being willing to even have a wifi antenna poking out of my skull.
I wonder, then, if we are going about this the wrong way. We are trying for ocular stimulation directly. If we could skip that and move to neurological stimulation directly, I'd expect VR and AR to finally reach the tipping point. There is, after all, a finite amount of miniaturization that's possible.
It is purely a hunch that tells me VR/AR are not destined for wide-scale 'normal people' adoption until it doesn't require external apparatus to utilize.
As it is, we already have people who don't even like wearing simple eyeglasses. However, if it didn't require such, then it may just be something we humans add to our bodies to augment it.
Thoughts?