Although I think it's a cool concept, I don't think many pvpers would use this technology. I think VR would be awesome in a game like this but I also believe it's not at that stage in which its viable for pvping.
I mean, the response times, chances of unresponsive Ness, etc. would cause even more risk in a game that ages and you lose game time as you die.
It also adds another aspect to the game that forces players to purchase more top of the line Webcams. No cheap Logitechs. Me personally, I also enjoy reclining and playing games in the dark. That said, the positioning and background settings would not be to my liking.
Long story short, it's a costly addon to the game but would be pretty cool to implement this type of VR for when I'm walking around towns and such. It is the way gaming is headed anyway. VR supported games that is.