For AI-generated 3D, I’m betting e-commerce will go mass-scale before gaming. E-commerce has a high tolerance for 3D quality—like a product preview or a rotatable display model, a few tens of thousands of polygons and passable textures are fine, since users just spin it around a couple times.
Gaming is way more demanding: clean topology, proper UVs, controlled polygon count, and it has to be rigged for animation. AI-generated models basically need a full rebuild before they can go into an engine.
So in the short term, e-commerce stuff like product modeling and AR try-ons will reap the benefits first. Game artists will mostly use AI for concepts and references; actually integrating it into the pipeline is still a long way off.
For games, the topology needs to be clean and UVs need to be neat. Stuff directly generated by AI will have to be scrapped and redone if you try to bring it into the engine.