My guess is that every era will just have its own name. 70s and 80's music will never be given the name "oldies' it will always be called classic rock. then they'll come out with retro-rock, and sucky rock, (ok, maybe it will never be classified as such, ).
This topic brings to mind a question I've been pondering for quite some time now. I'm 29 years old. What are nursing homes of my generation going to look like?
Every room has a computer with high speed internet connection. Every room has DVD player. We're all talking on cell phones or having skype conversations with our pals in the home across the ocean. People who come to entertain us will be up there trying to rap or play the old classic emo screamo music. Oy Vey.