I don't know if Kodachrome went on to be used for movies did it? (or is that a really dumb question?)
Kodachrome was used as movie film... it was the only thing my grandpa ever put in his old double-8 camera!
Marvelous film. Gorgeous colors.
Kodachrome, while not being the first "color film", was the first practical color film. Before that, there was the Lumiere Autochrome... but it couldn't be used in movie cameras (I think it was only possible to make them on glass plates). The first movies with color had something that looked more like dancing blotches than real color. These were hand painted frame by frame on every reel... not practical.