[Welsh Anorak]

I used to show films (16mm) and found that the 'cinemascope' prints were often blown up versions of the standard print with top and bottom chopped off and looked terrible. Mind you, the reverse pan and scan technique was probably worse.
When I worked in a studio, monitors had the safe area marked in Chinagraph on the screen because of the overscan by most domestic TVs. Nowadays customers don't care as long as the image fills the screen!