>>165Film has been near-universally 24fps for almost a century. Projectors are double- or triple-gated to flash each frame 2 or 3 times, giving a refresh rate of 48hz or 72hz. Television has a field rate and a refresh rate of 60hz, but is interlaced, and so only displays complete frames at 30hz. Televised films are displayed with a "3:2 pulldown", meaning 3 TV fields are scanned from a film frame, the film is pulled down, 2 TV fields are scanned from the next film frame, and the process repeats.
So, no, the framerate standard for movies was never 60hz. The fieldrate standard for TV was 60hz because there was no way to refresh an analog TV multiple times without transmitting another picture anyway.