We haven't had cable TV for at least 4 years (I'm too lazy to suss out how long exactly), but that hasn't stopped me from enjoying sports viewing online. Many games are streamed, and I watch some of these.
The Olympics is being streamed, but for a charge. That's where you lose me, NBC. I don't care enough about the Olympics to pay to watch. Link: interesting CNN article on #NBC Fail.
If I paid for premium cable, then I could stream live free of charge. Well, that's $1,200/year I save. Trust me- the Olympics isn't worth it to me.
It's curious. Comcast owns NBC. It does not own ESPN, but I can stream a host of Major League Baseball games, and college football games on ESPN, as the website says, "courtesy of your internet provider". I guess NBC & Comcast are gambling that the interest is great enough for folks like me to leap over the cost hurdle. Alas.