The "de-facto" standard for design and art in public spaces, corporations, websites, flyers, movies, posters, is that which can provably and evidently only be produced by well paid, furnished dedicated professionals. The standard isn't what looks good, it's what is evidently the work of someone or something with sufficient resources to be worth paying attention to. The standard will shift to something that cannot replicated easily by some 10 year old kid with 20 dollars worth of DallE-5 credits.

I can imagine the standard shifts from quality to scale. I.e a company doesn't give a shit that they have nice design, but rather they make something so ugly that noone could mistake it as being something someone commissioned from an AI, and spread it in necessarily low-supply spaces. (i.e. a new social media company's logo is a green poop emoji that they pay every west coast MLB player to get a tattoo of on their forehead).