Originally Posted by
Sargehalo51
I think what helped Rocksmith, even though it was the new kid on the block, was that it was a game designed to teach guitar and be used with real instruments. Guitar Center got behind it, various musicians got behind the game, and I think it has a "legitimate" teaching factor that games like GH and RB have never been able to really claim (even with RB3's Pro-Mode).
That's my personal reason why the new kid on the block is nailing down some great artists, that neither of the other major music games have gotten!