This shows that Esports is getting bigger and bigger in this world and people and companies are taking it more seriously. It is a good idea if someone came up with a website that allows you to bet on Esports.
It is, Esports market is really big though. For an example, dota 2, everyday dota 2 have many matches and it's really good for betting. There are many sites who accept esports to be part of gambling sports though.