One might expect to hear more complaints from developers about the need to update their apps again and the challenges of letterboxing. But it turns out developers are far more resilient than you might give them credit for--and with good reason. Each explained the significant benefits involved in keeping current with the latest iOS advances, software and hardware alike.

"After the iPhone 4 shipped, apps that weren't Retina were very quickly ostracized and likely lost revenue," said Barnard. "I think we'll see a similar pattern here."