I collect certain categories of greeting cards (Deco, silhouette, photographic, wartime, etc.,etc), plus 2-3 specific categories which I find of interest because they so clearly reflect their bygone eras. One of these is smoking and cigarettes on greeting cards (of which there are an amazing number), another is spaceships/rockets/satellites on greetings cards (1950s), and another is television sets on greetings cards (1940s and 1950s).
Television, as we of a certain age well remember, seemed such an astonishing, miraculous and wonderful technological advance at the time, which in fact it was. Images of TV sets and rooftop antennas were everywhere to be seen, including on greeting cards.
(As a don’t-get-me-started aside, it is my belief that—though little could we have known at the outset—TV would grow up to become largely a cultural wasteland filled with mind-numbingly trite fare; and even worse, would condition our entire nation to regard anything and everything seen on television as merely some sort of entertainment . . . including important real life issues such as politicians, elections, race relations, poverty, homelessness, facts vs nonsense.)
I don’t spend any time looking through modern greeting card racks to see whether smartphone screens are now as ubiquitous as television screens were in the 50s, but likely they are, suppose.