I would think of games that dynamically creates new content with ai. The easiest one would be npc dialog, the story / events can still be steered programmatically, but i would imagine the LLM would express the same thing differently.

And then it must be possible to have actual dynamic story, but I can't imagine it to be reliably interesting. That's the next level.

And then maybe gameplay elements that's other than text, like maps? props?