Marcus Ash, the Group Program Manager for Cortana on Windows Phone has revealed in a tweet that Cortana has been updated in background. The latest update lets it predict football match outcomes beforehand. He has also posted the above screenshot of Cortana predicting outcome of Belgium vs US game.
@CosminVasile New service update. Should be live for you to try out now.
— Marcus Ash (@marcusash) June 28, 2014