OT: I won't say Guitar Hero any longer, but Rock Band, rather, has been the mainstay of my music playing games (Send me a PM, I'm playing it rather regularly), but if either Rock Band or Guitar Hero decide to make a comeback, there is only one reason I would buy a new game, and until it's answered, I'm not big on the whole idea of buying more sequels:
I don't think Rock Band will have a sequel any time soon. Fortunately, there's still a nice stream of DLC coming out. I probably would have passed on RB3, but...KEYBOARDS! The other "pro"
instrument options are nice, too, but my drum kit's sitting in storage and may be dead, and my pro guitar literally did die in a fire. Not replacing the latter any time soon.
I spend most of my RB time trying to learn and play the key parts, anyway. Singing's still fun, but I don't have any friends who can sing, so harmonies are out, and I still break out my fake guitar, but not as often.
RB3 may actually be the best title to date, considering the additions and a pretty solid soundtrack, plus backward compatibility. IT's a shame it came AFTER market saturation, but at least Harmonix is still supporting it.
Now give me some more Tribe, dammit!