I recently played Charon 13 which has some weird AI cg added in to some scenes and it was pretty jarring at times. Not good. But for some fun here on the thread, then I'm all for it.
There's a lot to how it's used.
2 games here that use it are Amnesia and Burning Boundaries(it used to be called Babysitters).
Even within one game the results can be inconsistent from one "AI enhanced" scene to the next.
But devs are learning, tools are improving...
IMO, doing super close ups of a girl smiling isn't quite there yet...
But a girl riding animation can be made less stiff by AI.
Same with cumshots.
It's a matter experimentation.