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It was done. Teletext delivered news, sports results, horoscopes, closed captions, all directly to your TV in real-time. It was quite clever as a pre-internet method to deliver text content to every home.
All the people in the comments here being unaware of this makes me feel old.
It was not a thing in the places I grew up in. But when I saw it working during a European visit, it blew my mind. That was 20 years ago.