The big news from Apple last week was, of course, the arrival of the new iPhone 5s and iPhone 5c. But Apple executives also recapped iOS 7, the next version of Apple's mobile OS for iPhones, iPads, and the iPod touch.iOS 7 rolls out on Wednesday, two days before the new phones will be available. And while it has a slew of new features users will like, the updated OS also offers important advances for enterprise users.