I predict that they would miniaturize the entire NFC and bluetooth chip/circuitry necessary and embed it completely inside the Watch to make it stand-alone so it will not be dependent on an iPhone or any other device. That might not happen until iWatch 2 or iWatch 3, tho.
The watch already has Bluetooth and NFC in it. What it lacks is a data connection. Adding that would be problematic for both size and battery life.
Watch shows what happens when Jony is allowed to run wild. It looks beautiful but is fundamentally flawed