With Rock Band, you can play along to Black Sabbath or Nirvana and possibly find new ways of appreciating their artistry by being allowed to perform parallel to it. Rock Band puts you inside the guts of a song. ↗
The REM and Nirvana successes don't mean much to me except as a potential distraction for bands who want to cash in on the trend. Don't try to sound like someone else. REM and Nirvana don't sound like anyone else. ↗
I'm really into Sweet 75 right now, and I dig playing Nirvana, don't get me wrong. Even if Kurt never died, more than likely I'd be in Sweet 75 today still. ↗