What's new? - Back: No longer reflective glass, Apple has replaced it with a matte black aluminum - Larger Display: The prototype is about half an inch longer than the 4s, meaning the screen size has increased (poor devs!). - Headphone jack: The audio port is no longer on the top together with the hold button, it's moved to the bottom, next to the two speakers (or one speaker and one microphone?). - Front facing camera: The front facing camera is now placed above the ear speaker, in the center of the iPhone. - Dock connector: The dock connector on the prototype is smaller as well, it's now about half the size of the current dock connector.