I've met somewhere that topic, I can not find a link, about creating Ether contracts for betting on the FIFA World Cup 2018. The idea was that everything is transparent. You see how many people bet on a certain contract with certain conditions (victory, defeat, number of goals, etc.). If the terms of the contract are fulfilled, the money is automatically divided between the winners and sent to their purses. I'm not very keen on stakes, but the idea seemed pretty interesting to me.