What will be the new features on the iPhone that's coming out in September?

I've seen on YouTube that on the iPhone 5S/5C/6 will be have better camera, different colors, and that it will be cheaper than the iPhone 5? I want to get a iPhone, but I'm not sure if I should wait until next month or until Saturday to get my iPhone 4S. If the new iPhone will come out next month, on what day will it come out? Help me and thank you for taking your time in reading this and answering my questions…

Well what I want to be added is the processing should be easier and not that messy as earlier ones. And no doubts the Apple Maps are enhancing in the iOS 7.It's coming up with more transparent icons and all that features. Let's see what we'll get after a long wait.