The interesting possibility is that all you may need for the setting of a future AAA game is just a small bit of the environment to nail down the art direction. Then you can dispense with the army of workers to place 3D models on the map in just the right arrangment to create a level. The AI model can extrapolate it all for you.

Clearly the days of fiddly level creation with a million inscrutable options and checkboxes in something like Unreal, or Unity, or Godot editors are numbered. You just say what you want and how you want to tweak it, and all those checkboxes and menus are disposable. As a bonus that's a huge barrier to entry torn down for amateur game makers.