Uau, That's a long trip from Final Fantasy! I suppose it's a matter of time till all movie studios are dead, or at least so changed as the newspapers with the advent of the Internet. It's the same situation, democratization of publishing, If everybody can make a film by writing a prompt, then all you need is the script writer, really. Well, and a film editor, probably.
On the plus side, perhaps we'll see some original content now. On the minus side, I guess the 2030's Oscars ceremony will sport no glamour actresses on the red carpet, but geeks holding laptops. Instead of "who's you dress from?" (Valentino) you'll have "who's your bot from?" (OpenAI's "Filminator" with some continuity tweaks from a recent startup, you wouldn't know it)
I wonder if you could prompt it just "Take 'A Tale of Two Cities' and make a film from it"., and what would happen.