Rock Band - Game or Music?

I'm not sure where to really start this entry. I'm not particularly big on video games, but now that I have a Wii, the next step is to wait for June 22 when Rock Band comes out for the Wii. This game tests your rhythm more than anything. Sad thing is, I have a real drum set, piano, and guitar sitting at home just collecting dust. However, I don't believe the game is any sort of replacement for real musical instruments. A game is just a game. Music, however, is truly one of the greatest gifts of life. Without it, my everyday would be that much less inspiring.