In the future, the marketing guy, can just create a draft/visual guide through AI, and send it to some outsourced artist to refine. The outsourced artist can be from any country, because again, language for precise communication is less important.
Competition is going to be brutal, especially for more traditional corporate art (The standard corporate memphis style can already be perfectly executed by SD+dreambooth, because its so easy to draw)
Much better to be in the comics/animation/movie business, where demand will boom in response to drastically improved quality.