I assume AI generated metaverse would have to consist of some kind of "markup language" describing the data-structures that make up the metaverse. But markup l

I assume AI generated metaverse would have to consist of some kind of "markup language" describing the data-structures that make up the metaverse. But markup language is still about computation, describing the computation needed to render the metaverse. Then while the AI can easily generate syntactically correct markup, we can't easily specify what we want that output of that computation to be. Perhaps some entertaining random game-worlds? But is that really useful for anything? Some entertainment yes, but how will it actually accomplish something useful, is my question.