"The great era for big screen cinema was, of course, the 1950s when the industry began to feel the threat of television. Although cinema had little competition in terms of the fuzzy, black-and-white TV picture (colour TV didn’t become mainstream until the late 60s and it would take another four decades for HD to arrive), the threat was real, and making screens bigger was one way to respond."
Denning, Roland. "Cinerama: This Is how the 1950's Revolutionised the Big Screen Experience." Red Shark News. October 3, 2021.