> a living room with two white armchairs and a painting of the colosseum. the painting is mounted above a modern fireplace.

With the ability to construct complex 3D scenes, surely the next step would be for it to ingest YouTube videos or TV/movies and be able to render entire scenes based on a written narration and dialogue.

The results would likely be uncanny or absurd without careful human editorial control, but it could lead to some interesting short films, or fan-recreations of existing films.