Rock Band 3 is going to make tens, if not hundreds of thousands of gamers into actual guitarists. How? It cleverly shoehorns guitar lessons into a game that kids and adults both love. And this is how it looks.
I'm currently working on a review, but for those of you who are wondering what the process looks like for playing either the button guitar (plastic guitar that simulates a guitar) or the real guitar (one that can be plugged into an amp), this is it. You're actually playing the real notes, which is amazing in the sense that you can go and play that song after you're done learning it on your console.
Harmonix, do you realize that you've got in your powers the ability to make kids learn the songs you want them to? Which is basically shaping the future of music? Use it well, my friends.