I think it's another case of moving the goalpost whenever AI can do something that used to be exclusively human. If we could send DALL-E's images back in time 10 or 20 years, everyone would say "of course it's a real art, computers are too dumb to do that!"

I expect DALL-E to pass a picture-based variation of the Turing test (an evaluator asking human artists and AI to draw things). The current implementation has a few small giveaways like drawing hands poorly, but that seems fixable.