1. We already have that now, it's called Word. Most people are just too lazy to write out their story. AI doesn't improve the situation, it makes it worse. It will become vastly harder to find the good stuff in the avalanche of crap.
2. Current AI can't do what you're describing, so the biggest difference is that you're posing a hypothetical against the real world. But more specifically: the director already has a specific vision in their hand; the purpose of the "direction" is to bring this vision into reality within the scope of their budget and resources. With AI, you have a general idea and the AI creates its own vision and you pick what you like the best, until you ultimately realize the AI isn't going to get what you actually want and you settle for the best the AI can do for you. So, completely different.
2. Current AI can't do what you're describing, so the biggest difference is that you're posing a hypothetical against the real world. But more specifically: the director already has a specific vision in their hand; the purpose of the "direction" is to bring this vision into reality within the scope of their budget and resources. With AI, you have a general idea and the AI creates its own vision and you pick what you like the best, until you ultimately realize the AI isn't going to get what you actually want and you settle for the best the AI can do for you. So, completely different.