I can't speak for globally, but a quick search online says that around 43 million people in the USA don't have broadband. "Broadband" meaning 25/3 service. I'm willing to bet the true numbers are significantly higher than that, and I don't really count severely data-capped wireless service as being broadband like the FCC does.

Anyway, even that number alone is a sizable market, and even Comcast would be happy with a fraction of it. I know some parts of the world are better off than the USA, but I also know many parts are worse off.