Television transmits a tremendous number of programs on film.
Most TV commercials are on film. Since 30 fps gives you better temporal resolution with live TV, we don't seem to realize that with film there isn't anything to be gained by converting 24 fps film to 30 fps. Telecines do not have an image that starts off as an interlace. The film frame is progressivly scanned. Today some of the newer TV cameras for surveillance applications are progressively scanned and the image output is in an interlaced mode.