I doubt RB will blow it away, though I do expect to still prefer it. I think the Guitar Hero drums look like a cheap toy, I'm definitely going with the new RB set with the add-on cymbal pack. I haven't tried either new guitar so the jury is out on that one.

The music creation aspect could be amazing if people can handle it. The fact that we will have access to an unlimited library of user-created content could put GH on top, but I have a feeling it will be hard to come out with something good. GameTrailers has a few vids up of how "easy" it is to make a song (http://www.gametrailers.com/game/6785.html). Watch "Walkthrought Part 4". If that's the kind of songs we can look forward to then count me out, what a joke.