Re: Let's face it--true VR is a Unicorn.
But it'll still be Uncanny Valley without the rest of the senses involved: especially touch, which we tend to rely pretty much by instinct (see reflexes). Plus there's the matter of the processing lag, which looks to be a sand hill (as in every time you climb, no matter how fast, the sand loosens and dumps you back down) in terms of making it possible: as soon as you reduce the lag, we'll demand more resolution which raises the computational demand further, raising the processing lag again.