I went to Gamestop the other day to pick up a fresh Taiko drum, and on my way out I spotted a Xbox360 display being played by someone. I walked over to it to take a short peek. I stood there for about 10 minutes watching this person play, and in that time I really wasn't impressed at all. I asked the guy if this really was Kameo and he mumbled "Yes". I really didn't see anything that couldn't have been done on Xbox, not that I'm a graphics whore, but the gameplay seemed pretty average as well.
On a good note I finally got my hands on the controller and for the brief time I held it, I thought it was a major improvement to the horrible Xbox controllers. I might buy one for PC now.