I had read tons of science fiction. I was fascinated by other worlds, other environments. For me, it was fantasy, but it was not fantasy in the sense of pure escapism.
If you don't physically age gracefully, it's a bit sad. I think Steven Tyler can get away anything, because he still looks like he did in '73. Especially from row Z backwards in an arena. As long as the Stones keep their hair and don't get fat they'll get away with the wrinkles.