SATELLITE TV ON PC DOWNLOAD - WHAT DO I REQUIRE TO WATCH TELEVISION ON MY PC?

A few days ago I was listening to XM Radio on the "80's on 8" station and the announcer said from world Earth. I laughed because what he was actually saying is that all radio stations provide you a call sign and then they say, what city they are from, however XM radio is a terrestrial satellite radio station and it beams at signal down to whoever i