AI achievements will be indistinguishable from human achievements. Humans will try to pass off AI achievements as their own. The line will become so blurred that it will be impossible to tell the difference.
Incidentally, this hasn't happened in areas where AI already dominates like chess and go. Magnus Carlsen alone probably generates more "revenue" than all chess AIs combined.
It is possible for the labor to quit and find something better to do, as happened to elevator operators, but that's a good thing.
In the case of chess, AIs don't want money and Magnus does, so they're not going to help you find ways to get more of it.