Well as a metal head from the early 80's I can say that the age of the true "Metal" band is long over. You have plenty of them all doing the same thing and sounding the exactly the same on the DM scene but no one you will spend $100 a ticket to go and see that's for sure. Hell I wouldn't fork that out to even see Metallica with anymore, which in my opinion is the last of the true metal (not extreme) bands out there. Grunge killed metal imo... they definitely killed the 80's era of your typical metal\big hair bands.
Lamb of God is another one I can think of that is still trying to do it. The thing is there are no riffs left to discover, lol every freaking possible metal based chord progression has been used already in some song or another. You can't even write a metal tune anymore without someone saying "Hey that sounds like so and so" or "Who did you rip that riff from"? I forget who it was that said during a documentary I watched about metal music, he said "Pick another genre because Black Sabbath took all of the good riffs already, nothing left to do here"! and this was 10\15 years ago!
I agree that we all need a new kick ass metal band that we can all bang our heads to. Something that makes this 45 year old man want to strap on the Doc Martins and go throw some elbows in the mosh pits again. On second though I'll just keep my old ass in the balcony seats and watch from above!