Rock music and any sort of associated genres, (Punk, Metal, etc) are always going to be live experiences. I doubt we'll ever get another moment where rock captures the public attention, but as long as musicians keep wanting to tour, the fans will show up. Case in point, Download festival happening right now, still pulling in huge numbers every year no matter what.
I mean, a few weeks ago I went to see Example (For any who don't know that'd be electronically driven rap) and while it was a great show, it didn't compare to the Machine Head gig I was at last week. It just seems like rock music will always come up top when it comes to live performances.