Firstly AI will be used to work faster, to create scenes faster, to furnish them like images from many angles, and then later to synthesize entire world spaces, game engine companies like unreal and Nvidia will have some draw-your-scene tools which are like diffusion iamges except in 3D. The render times will be slow for this decade, although once the scene is created it can be saved and perhaps takes 1 hour to do previously 1000 man hours of work, so indies will be doing AAA games.