I don't have a a VR rig and haven't actually played with anything remotely like it aside from putting my phone in my face and going cross-eyed. That said...
I do not believe in the current V.R. technology. It doesn't, to the best of my knowledge, have the ability to do anything with eye focus. Now most of your brain will work off of eye coordination, but I expect that for any sort of immersion project like this, we are talking about a lot of time spent with things right in front of the eye and it will be bad for eyesight in the long term, but that is just speculation on my part so someone could say that I am just wrong here and that would be plausible. Secondly, it has issues with sensory stuff, it is pretty good with visuals but in my experience, if the subject is good enough, then a flat screen is plenty to immerse you. I mean, Dwarf Fortress can be immersive if you are into it enough... I don't really see purely visual stimuli as really being enough of an advancement to really raise the bar on immersion. I do not know how they are going on surround sound and blocking external sounds, ut there is no smell, orientation, pressure, or any other ability to provide stimuli or suppress it so...
If you are going the whole hog and suspending yourself from cables and seeing your hands move and interact with stuff in-game and being able to duck, walk, run and jump naturally, then yeah, that would be a thing, but aside from being expensive to build it would be difficult to place and the extra equipment to track the rest of your body would be a right pain, possibly literally...
I suspect that to get true virtual reality with current technology you would probably need a hypnotist and something hallucinogenic...
But I agree that it would be pretty cool if technology got to the point where it could actually provide an immersive experience via brute-force...