With less than a day until the iPhone 5S's official unveil, images of the iPhone 5S's packaging appear to have leaked from Apple's Chinese supply chain. The packaging, if it's real, confirms that the iPhone 5S home button will be changing -- from the boring button with a rounded rectangle in the middle, to a new button with a silver ring around the outside. We believe that this visual change signifies the addition of a biometric fingerprint scanner to the home button, and it's also possible that the entire button -- or perhaps just the ring -- will be capable of changing colors, perhaps as some kind of notification system.