Southern California's climate will likely attract motion pictures, and with it the visual entertainment industry, given what David T said: it's conducive to outdoor filming year round, plenty of sun, and a variety of topography. It's not inevitable that there will be total relocation there from New York and environs, but a substantial base will be established: perhaps New York will be a hub for more serious, arty motion pictures, drawing talent from Broadway, while California productions are lighter and more fun. It's tough to imagine something like W. C. Fields' "Never Give a Sucker an Even Break" shot much of anywhere besides 1941 LA, while it's easy to imagine any of Orson Welles' earlier cinematic ventures coming from NYC.
Assuming that's true, where LA gets fun movies, there'll still be ample opportunities for growth from aeronautics/aerospace, defense industries, agriculture, and oil in southern California. The Bay area will be a more no-nonsense industrial area, focusing on shipping, shipbuilding, and similar heavy industries--with a sizable intellectual overlay from Stanford and Berkeley. One side effect: northern CA wouldn't be as far to the left politically as it seems to be today. Come to think of it, the same could be said about the LA area.
Assuming that's true, where LA gets fun movies, there'll still be ample opportunities for growth from aeronautics/aerospace, defense industries, agriculture, and oil in southern California. The Bay area will be a more no-nonsense industrial area, focusing on shipping, shipbuilding, and similar heavy industries--with a sizable intellectual overlay from Stanford and Berkeley. One side effect: northern CA wouldn't be as far to the left politically as it seems to be today. Come to think of it, the same could be said about the LA area.