Did anyone else ever play a similar game in the arcades? I think it might've been by Namco. In fact, I thought this was just an arcade conversion when I first caught a glimpse of it in the conference video the other day.
It was one that worked on a similar premise, with a plastic sword and sensors around the screen that detected movement.
The novelty of the whole hack and slash thing wore off as your arms grew more and more tired...
I know graphics aren't everything, but I'm a little concerned that perhaps Nintendo aren't giving as much support/knowledge to the 3rd party developers as they'd like. :\