Not too impressed. If I wanted to feel like I was moving around, I'll go outside and move around. I'd much rather play video games on a big screen with a nice loud surround system, not some visor with "surround headphones" or whatever they called those god awful looking things.
Don't get me wrong, Nintendo is revolutionary, and they take a lot of risks, and I am a bigtime fan of their stuff (Still have my SNES and N64), but this really isn't getting me excited.
One thing I was curious about though, they showed a picture of what appeared to be a Gamecube, with an arrow pointing to this new device, does that mean you can plug your GC into it and play existing games through the visor? That'd be a big plus.