I was able to try Guitar Hero for the first time in my life this week. My friend J.D. introduced it to me and he is unbelieveable on this thing. I made it through a few levels and I was addicted. It's not really anything like a real guitar, but it is a ton of fun.
I didn't care too much for most of the imagery. Maybe someone can come out with "Praise Band" for Guitar Hero. :)
I have to admit I had one of those surreal moments when you know that your doing something that will be one of those things that categorizes a certain decade. Remember Rubik's Cube, or Intellivision?