This would be something huge.
Where else can you have a guaranteed edge in a series of 50/50 bets?
Especially this, many dice sites out there have around 1% house edge, which doesn't sound like a lot (considering casinos) but building up a place where players can bet against other players, without fees or third party winning on their betting activity, would be revolutionary.
I had a project in the making for soccer prediction betting after following @nanzo-scoop's score prediction posts, it had a lot of rules that would be related to the part at the end of your post. Players would earn points for correct predictions in the past, gain more influence in future bets, etc while using the Steemit reputation system as first filter.
I am very excited to see how this will evolve further on the platform, glad you brought it up.
points system is very interesting in a way with Games on top of Steem, players can play with friends and earn points and game reputation as well. I am exploring this, but from slightly different angle...