To put "eSports" into perspective, let's take League's 2016 World Championship in the context of the other world championships.

2016 Basketball Worlds Final Game: 31M viewers 2016 Baseball Worlds Final Game: 40M viewers 2016 League of Legends Worlds Final: 43M viewers

So, okay. eSports isn't quite at the American Football level. But, it right in line with the other top broadcast sports