Next version of iOS with overhauled notifications, lock screen, Messages, Apple Music, and much more.
Apple to Launch Official Development Kit for iPhone in January?
According to "sources familiar with the company's plans":
Apple will release a software-development kit for the iPhone in early 2008, enabling programmers to create games, business-productivity tools, and countless other applications for the device.
A number of conflicting reports have expressed beliefs that Apple would further expand these Web tools or invite specific developers to produce true applications on the iPhone.