Once you think about it, the term post-modern itself is a contradiction unless you're talking about the future. Anyway, I think the new generation of artists will bring something new to the table and that will be the next wave. Fifty years form now, they will be in whatever movement thay'll be in, but they'll refer to this period as post-modern even though it's in the past. What will this new generation be? Well, I predict a movement back toward classicism since many art students I know seem to condem art school and the current movements in favor of more literal styles. Even if everything will be done on computers within the next decade, it will probably have much more of a classic style. Maybe art will incorporate pop culture once again, this time in form of actual playable video games as art in show rooms or comic books. The point is, art will continue to prgress. Anyone that says otherwise is stuck too firmly in the present.