These are said to be iPhone 5S photos right off of the assembly line. Unfortunately, because it’s expected to look just like the iPhone 5, there is no way to know if it’s real right now. We can only go on rumors and speculation.
What we do expect is faster internals. It will probably be speedier than the iPhone 5. We’ve also heard that it will have a high speed camera ideal for capturing video for smooth slow-motion playback.
Other rumors include an NFC reader and a fingerprint sensor, but those, honestly, are less believable. Apple doesn’t seem interested in NFC at this point and the fingerprint reader seems more like part of a major hardware revision.