Watching video game-related programming has become big business during the last few years and today it's very common with streamers turning into huge stars with plenty of influence across various media. American outfit Super Data Research has a few stats to offer that show exactly how popular it has become, and it turns out that "more people watch GVC than HBO, Netflix, ESPN and Hulu combined".
In fact, more people watch others play games than twice the population of the US. Also, a service like Twitch alone has more viewers that major channels and services like ESPN and Hulu. Take a look at the data below.