Unique style paintings will become even more valuable in the future. Generative AI only spews "art" based on previous styles it learned / was trained on. Everything will be even more rehashed than it is today (nod to Everything is a Remix). Having a painting made by an actual human hand on your wall will be more ego-boosting than an AI generated one.
Sure, for general digital art (ie logos, game character design, etc) when uniqueness isn't really mandatory, AI is a good, very cheap tool.
As for the "everyone becomes a programmer" part... naah.