It's hard not to notice that even though this is explicitly about contemporary movements, the newest one is the Young British Artists, a 1990s phenomenon. None of them are contemporary in the way we'd generally use the term.
Of course an artist doesn't have to be classified by an ism to do vital work. But the presence of these various schools of thought in the art of the last century does seem to have indicated a general interest in art and artists, one that seems to be lacking now.