If you think rock could actually die at all, then it's pretty clear to me that you're not very bright.
Rock was actually doing considerably much better in the early 90s than throughout the 80s, regardless it certainly wasn't dead, it's not dead now, and it never will be... Regardless of how baRAB the scenes may be, genres can't actually die... Though it's understandble that you say it died in the early 90s because you are a grunge hater, dispite the fact that I am a grunge fan I have no intention of getting hostile unless you become abrasive about it... I will be easy on you, dispite the fact that Atheist sucks total ass.
I also don't see extreme metal being the future of expression anytime soon... Hence, no one genre will be the basis for artistic expression, as people express themselves in different ways, they do it through different genres of music, so what you just said is incredibly stupid.