They made a good decision to give it a break mid last gen. This is the kind of game that could pull some of the casuals back into console gaming. I will buy this, my wife liked the old guitar hero games, and my daughter will 5 by the time this launches, she won't be good at it, but she will have fun with it.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut