Apple has been using ideas that originated in the jailbreak community for years. A jailbreak tweak called MobileNotifier enhanced push notifications in iOS 4, and Apple hired the guy who made it and released Notification Center in iOS 5. Jailbreakers were doing multitasking and tethering before Apple too.
Looking ahead at iOS 7, I honestly have no idea what to expect from Apple. Jony Ive has never really been a big fan of skeuomorphism, so flatter and more minimalist graphics wouldn’t surprise me. Some truly innovate ideas for enhancing the iOS experience have arisen in the past year, and I think it would be foolish for Apple to not at least draw inspiration from these three.