Re: Who are today's guitar heroes?
Any guitar hero who wasn't more interested in his hairstyle just kept on improving. Holdsworth and Gambale. Those are two guys who have improved with age, as any musician should. But, alas, they are not considered guitar gods by the mainstream.
Guthrie Govan is one of the better players around nowadays, but on the other hand, Guthrie's been around for a long time already. He isn't exactly "new", he's only new to the younger generation.
I almost agree with Ibanez249 when he says no one has passed the torch yet. This is kinda true. They don't make guitar heroes like Yngwie and Vai any more. That's not to say they are heroes of mine (hell no! I grew out of listening to them long ago), and I believe there are better players out there, only their haircuts aren't as good. That's the difference, I suppose.
Tony MacAlpine shouldn't be forgotten. He played neo-classical in the early days and then turned himself into a fantastic fusion guitarist. Check out his albums with Planet X and CAB. Have Yngwie and Vai improved and grown as musicians like that? I don't think they have. Their best work was done long ago, and everything is different now. Nobody wants to prance around in Lycra and be a guitar hero!