CheatCC - It went from Guitar Hero to Guitar Zero in 60 (months). It was a great concept, nicely executed, and it was subsequently incredibly successful. In other words, it had its time and has seen its day. With several sequels and song expansions, it's been milked. It's been milked to a powder. Squeeze that electronic teat once more and you'll get dust. The kind of dry, choking dust associated with an ancient tomb.