Well, I think if they are going to pull it out it should have NFC-enabled passbook, a accelerometer (for example to pick up a call you should raise your hand to the ear) with built in mic and speakers for siri, a health and sports control-meter-thingy would be nice and directions and maps maybe... but I think that the iPhone not should only bring Stuff to iWatch, the iWatch would bring Stuff to the iPhone. I have no idea how but it should.
Now we wait.
Now we wait.