Want an easy reference? See First Person Shooter games.
Turns out that once the computer can mostly do the job, you will see:
1. Constant use of the computer for that job
2. Constant accusations of using the computer in places that restrict it.
See basically every online FPS community that exists. And that's with incredibly invasive software running on player machines explicitly to stop them from using the computer to play - and People both still do it (in HUGE numbers), and the communities constantly bitch about the "rampant cheating".
Best case scenario is that they catch a few people who have no idea how to create art otherwise. But, short of an exam-like proctoring system where art can only be created under complete supervision, I doubt there's anyone in the whole world who can reliably distinguish a creation that is 90% AI / 10% human from 100% human.