If you can build a system that can generate engaging games and movies, from an economic (bubble popping or not popping) point of view it's largely irrelevant whether they conform to fine-grained specifications by a human or not.
Text generation is the most mature form of genAI and even that isn't even remotely close to producing infinite engaging stories. Adding the visual aspect to make that story into a movie or the interactive element to turn it into a game is only uphill from there.
In other words:
If you find a silver bullet then everything else is largely irrelevant.
Idk if you noticed but that “if” is carrying an insane amount of weight.