Sorry, but RB and GH are just a easier/lazier reversing the progress of mankind.
Why learn a real instrument when you can just click buttons and push a thinger up and down? It's totally the same!
My friend is pretty good at GH, and in GH2 there is a song that I can play fully in real life on my guitar (it's called "The New Black" by Every Time I Die).
So, he brought his GH2 and GH guitar down and hooked them up to my PS2, which is hooked up to my HT. I turned on my guitar amp, and cranked them both and played along with him.
I won.
SheepStar