There are actually more and more tournament formats becoming active every single day in the form of esports. These are essentially a form of electronic game just like poker is replicating the real world card games. They're also getting more popular with bookmakers as they can have huge fanbases that could potentially be drawn into placing a bet with the right sort of prompting. You used to only see games like Dota and CS:GO on most gambling sites, but there are more modern games being offered now at some of the biggest sportbooks like FIFA. I expect this market to get even bigger over time, the trick is the ability to prevent any cheating so potentially only live events where no tampering can happen will be tolerated.