I think there _is_ a scarcity of quality movies that don't follow predictable / mainstream cliches. Because its too risky to sink a lot of money into something niche. AI will change that. The number one thing it is going to do is reduce the time, effort, and money involved in creating quality films. The result will be more trash for sure. But also more high quality stuff, and a LOT more stuff tailored to narrower interests. And its probably going to be very cheap, and perhaps free for much of it.

We'll still see mainstream franchises though, because IMHO it serves as a form of social glue, i.e. gives people common things to talk about and experiences to share.