Could ethereum topple the sports betting industry?

It could be peer to peer betting with no “juice” (house edge). You could propose a bet based on recommended lines, and a smart contract links your bet with someone on the other side of the bet. Or you can browse open bets to take the other side of it. You could have odds. A smart contract locks both your eth up until an outcome is determined. You could even have parlays, with one side acting as the parlay maker and the other as the house.