I think it's a bit naive to believe that guitar heroes can bring the interest for the guitar back. People look back at the guitar heroes time with a nostalgic fondness for a time that doesn't exist anymore. This was already visible in Wayne's world and became more than obvious in school of rock. Guitar-heavy rock has become a geek genre. Pop has moved on. There are obviously various reasons for this: 1. Technological…
The electric guitar is now what the saxophone was in the fifties: the iconic instrument of the hottest music of dad's generation.
Guitar music is I'd say evergreen, but hasn't been the hottest thing for much longer.