Going back decades now, every major Apple OS update usually contains some features, let say inspired, by third party developers. A bullet on a feature list can spell doom for someone's pride and joy, but typically they live on, at least until their install base dwindles down.
The phenomenon has been dub'd Sherlocked, a reference to when Apple introduced a searching feature in OS X called Sherlock. It basically duplicated a third party utility from Karelia Software called Watson. Apple basically even copied the name.
For iOS there have been ample inspiration from the jailbreak community, which is much lower profile than OS X, but also app developers.
Macworld has a list of nine such new features out of this week's WWDC. Check it out, although it's an annoying slide show.