Talent Comes In Five Colours

For the first time last night I participated in the phenomenon that is Guitar Hero. I'd never had the slightest inclination to play it before but once I picked up that (pretend) Gibson guitar, I was unfortunately hooked.
I say 'unfortunately' because I always held the opinion that it was a pointless game because you're not actually learning an instrument. I still firmly believe this and when someone said to me, "I don't have a single musical bone in my body, but with this I feel really talented", I thought to myself, "Well you're not muscially talented, you just hit some buttons at the correct time, much like you would playing Tetris, Mortal Kombat, or Lemmings.
It's just that now I can't wait to play it again, and again, and again. Gotta nail Kings Of Leon's Sex on Fire.
All I really want to know is where's the guitar hero that teaches an actual semblance of real guitar? If you are rewarded by singing in Singstar, then why can't you be similarly rewarded in a game with a real guitar? Even the drums in Rock Band resemble drums.
There have been so many amazing advancements in video gaming yet with this we are restricted to five coloured buttons and a white strumming thing.

Or, maybe, just maybe Paul McCartney used a Gibson Les Paul like this: