There's already people on certain discords endlessly fapping to Waifu/Hentai diffusion and using things like NovelAI to generate stories... they're really good at using prompts to generate porn.

Once you can generate videos, games, music and voices... it will go up another level.

And once VR evolves, it will go up yet another level.

You can already do that with Waifu Diffusion but it can't do text yet, you would have to insert your own manga bubbles.