What current music will still be listened to in 30-40 years?

[nyc999]

I was going through my music collection recently and thought about how much of it is from the 60's - 70's. After 30-40+ years, many people still listen to the Beatles, Stones, Zeppelin, Doors, Dylan, Floyd, Motown, etc.

After thinking about this, I was wondering what current music has the best chance of still being popular three or four decades from now? I'm thinking maybe bands like U2, Chili Peppers and Nirvana (not a current band but still very popular).

OOT - which current music do you think will live on in future generations, and why?