Art. At least, until we get AI which is actually capable of thought, which I personally don't think is going to happen. Art of any kind is completely inaccessible to the sorts of "AI" being put forward now. Art is fundamentally about conveying a meaning beneath the surface. All art, visual or verbal or otherwise, shares this trait. AI has no feelings, no meaning to share. All it does is meaninglessly mimic the form of art made by others.