It's gonna come down to a battle of how well AI can detect other AI and can note content as real or AI generated IMO. I mean look how good the video generation has become in the past 6 months. Give it another few years and it's 100000% cooked. You want a new marvel movie? just tell it what to do. Nobody is going to care about digital media any longer. What's going to be worth $$$ are personal experiences. For example you can generate all the movies you want, but going to see a concert or play of actual "humans" doing the thing is going to be highly sought after.