That's a fascinating essay, or at least it was until after a while it started reminding me that about 38 years ago, when minoring in philosophy, I figured out that most philosophy, and I guess intellectualism was crap! A lot of it was crap, anyway.
Anyhow, on the art threads here on FR, which can be fascinating, postmodernism gets no respect at all, not even from the few freepers who admit to liking abstract art.
Maybe we're already past postmodernism, too. Wonder where we are if that's the case?
Trying to come up with a name for "after postmodernism" is just impossible. The comic book world uses the retcon tool to just re-name the previous Modern Age to something else. That way, what's current is always called "Modern", and you never need a "post-Modern".