2 years later the very first television advertisement was broadcast. On July 1st, 1941 a 10 second advert for Bulova watches was inserted between a broadcast of a baseball game on a New York channel for the princely sum of $4.
The rest is history. The world of broadcasting became a massive industry, revolving around content to sell adverts. Initially the greater the mass audience of the show the greater the cost to insert an advert. Huge brands were built largely through Television advertising because it allowed businesses to take advantage of the attention, the television enabled.
Today the Superbowl is the pinnacle of TV broadcasting, commanding a fee of $166,666 per second, equating to $5 million per 30 second slot.
No sane person would deny that television doesn't still wield great power in it's ability to congregate attention and insert adverts BUT the writing is clearly on the wall that a seachange is happening before our eyes.