Okay, I’m prepared to just say “screw it”, I don’t know when television “first” was introduced, because there’s so many conflicting claims I’m finding. 
My real point, however, was that adoption was slow. For however long it may have technically existed, it wasn’t in widespread household usage until the late 40s and early 50s, when miniaturization dropped the price dramatically, and when it began to have nationwide cultural impacts.
It’s like the difference in time between the very first motion pictures, and the point at which they were an everyday phenomenon that had embedded itself into the norms of everyday society.
