Call it whatever you want, I enjoy watching video game competitions. It's semantics, and at the end of the day "eSports" are bringing in a continually rising amount of revenue.
The significance here is making the jump from PC streaming to TV networks, it may not be the time right now for this but it's coming. Our generation grew up with video games, and every generation after mine, it's only a matter of time before it becomes completely mainstream.
Whether that happens on TV or not, hard to say, TV networks may be irrelevant in 25 years. I know I have no desire for a cable subscription when I can watch my shows online, hell, I don't even own a TV, I just use my big *** monitor for entertainment.