There was certainly a bit of arrogance in the Renaissance that was so quick to dub the years preceding it the "Middle Ages" as if everything was leading up to the time directly following them and there's a similar arrogance in so-called postmodernism. How do we know that this is where things are going? In any case I would be surprised if future generations think the line between modern and postmodern is a bit blurry or perhaps non-existent, since today all the years through the 17th century are often cavalierly lumped together into the Middle Ages.