The difference here for me is that Zeppelin is the greatest rock and roll band ever, the material has not only aged well it's even better in some regards, and they can still play. I was blown away by the O2- just magical.
And not to sound snobbish but there is no this generation's Zeppelin. That's never going to happen again.
Music is in such a pathetic state, I finds self going backwards to get new music. I like to rediscover or find things I've never spent much time with before.