Photography, computer graphics, Photoshop, synthesizers, samplers, and others have all been considered "not real art."

The irony is that the kind of genre art you see at Comic-Con is mostly reproductions of commercial properties or standard tropes and formulas, with very little original vision and creativity. Being able to draw something recognisable as [genre character name goes here], even with some skill, is not that high a bar, and it lives in a tiny niche in the art world as a whole.

AI brought something fresh to art for a while, but now I think creative people are more aware of the limitations. It's in a strange mid-way place between being fascinating, and being frustratingly limited compared to what it could be.

I suspect we'll start seeing meta-art soon with a much more interesting mix of creation, original thought, and execution.