History is more than chronicle , more than this happened or was done, then that happened or was done. History traces significant connections between events and presents some events as being more important than others. We have brought the same thinking to works of art, but if art ends we shall no longer view works as belonging in or to such relationships. No one says there can be no more art. Rather, art has been liberated from its fundamental task.
Artists can inhabit the free space of creation without fretting about the essence of art.
What now defines art is the condition of having realised itself. Art has reached a kind of internal ending, derived from the nature of art itself. Danto is an essentialist. Art has disclosed its essence. But no history, no more movements.