We have experimented with generating AI animations based on the 3D renders we create for the game.
We also experimented with generating renders using AI - however, we dropped this as they were not of an acceptable level of quality. We can produce better results with Daz3D.
My personal opinion is that the AI animations are decent. Yes, sometimes we can't always get 100% the same characteristics captured (small differences in the eyes, face shapes, etc.)
I have used this method initially on Vikings sex and Blood 0.7 ( just a few animations ) and 08 ( over 50 idle animations are done like that ).
After we finish a render in Daz3D we do some post work in Photoshop. (Not on all of them, but around 15-20% of them have some AI filters/touch ups applied in Photoshop that adds skin details (wrinkles, veins, etc.) These are things which Daz3D can't yet produce - so we need this tool to go above and beyond.
It's becoming industry standard now to use AI touch ups in photoshop.