A whole mess of us donned a prototype HD Oculus Rift VR system at this year's PAX Prime show, and here you'll see Jim Sterling and Spencer Hayes discuss how much they enjoyed the experience.
Personally, I'm not sold yet. I found that the HD system had a noticeable motion blur when I would move my head, but I also don't think Hawken (the game we were able to play with the Oculus Rift at the time) is necessarily the best demonstration of what's capable with the system. Maybe it'll sweep me off my feet the next time I try but, for now, listen to Jim and Spencer.
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