Alright, time for a little common sense here.
Zeh, VR is 3D, from the first VR enviroments in the 70-80s they had sterio scopic 3D.
jcb82, classes-less 3D is not here because it is very difficult to pull off. Just take a look at 3D TVs, or the 3DS; It is crap, hard to look at, and is only good for one person at a time. The problem is 3D with glasses is the fact that you loose contrast due to the filtering on the glasses. The other nice thing is that having 2 personal screens lets you adjust your own depth of field to be natural to you (no more headaches or things looking super deep or shallow).
DSpider, no it will not damage your eyes, and yes, slowing loosing your vision would be considered going blind. The reason that sitting 6-8" from your TV is hazerdous is because the thing is cranked up to 200-600cd/m2, it is meant to be viewed in a room with ambient light so that there is less contrast on the eye (causing eye strain) and designed to be viewed several feet away. This is why high quality projectors are under 1000 lumens, they are made for controled environments where less light is required. These headsets are a controled enviornment with screens that will only put out ~50cd/m2, which is plenty bright for their application.
I dobut Microsoft or Nintendo will compete with this tech any time soon. Nintendo is all about cheap social fun, where it is just as much about getting together with friends as it is playing a game. Microsoft seems to have taken more of an anti-interface aproach, leaning towards a lack of devices rather than something as intrusive as a headset. Granted, if it takes off, then they will be on it like a fly on poo.
I dobut this will be the default interface for the PS3 as the casuial gamer, and even some hard core ones, would be put off by wearing something. However, I think it is a next logical step for the PS. Sony has been about the personal expierence (which is the atraction for eletist bastards like myself). It is not about the social expierence, it is about putting yourself into a game or a story. That is why they have traditionally been the RPG console of choice (imagine skyrim in an imersive enviornment!). But like I said, this does not lend itself to some, or even most, games, just the epic games of the FPS and RPG relms.