iPhone 5S: Not An Upgrade, With iOS 7, It's More Like A Reboot
I like this Mashable take on the iPhone 5S. They call it a reboot rather than a straight up upgrade. Makes sense. Plus, there are not going to be a whole lot of apps out now that will true take advantage of the whole package - iOS 7, the M7 co-processor, and the 64-bit CPU.