Ben Horowitz says a famous Hollywood friend told him half the movie they’re making is AI. "[AI] really improves the economics of the current moviemaking industry, which has gotten extremely difficult with the way distribution has changed. And it’s going to make it much easier for many more people to make movies." "I think there’ll be a new medium that’s different than movies, the way movies were different than plays." "Every writer in Hollywood is already using AI to help them write dialogue…