I'm impressed with Guitar Hero. Not with the game, the game's awful. But how the creators made millions of people think themselves talented, and waste hundreds of hours accomplishing nothing. And make millions of dollars selling a pretty simple game, and a cheap controller for a lot of money.
With the time AND money spent playing Guitar Hero, anyone could easily learn guitar. I did. It doesn't take lessons. The only requirement is that you can't be lazy.
But then again, putting hours into a video game when the real thing is available is the epitome of laziness.