To some extent aspect ratio dictates what kind of content is viewed. The earliest TVs had squarish ratios because they mostly showed newscasters – portrait images, basically. The growing number of TVs at home pushed cinemas to go wider to create an experience you couldn’t get on your couch.In 1953 Twentieth-Century Fox introduced CinemaScope, giving the screen a 2.35 aspect ratio or to give it as a fraction, 21:9. TV broadcasts of movies had to either crop the image to fit the 4:3 tubes or use letter boxing (which made the small TV display even smaller). If you wanted a cinematic experience, you had to buy a movie ticket.