h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

At various stages people have lamented the music world with the arrival of jazz (in it's various incarnations), rock & roll, the beatles, punk, electronica, dance, techno, drum & bass, RnB, hip-hop etc etc. So in 20-30 years time, when our opinions REALLY don't matter, what are the next generation going to be complaining about?

Do we see a scenario where our kids are wishing that music could only be as good as Westlife or Gareth Gates again? If that is the future, I'm not having kids - I don't want them to grow up in such a sick & twisted world.