The watch is totally wirelessly glued to your phone. So without your phone on you the watch is mostly useless. That kills all point for the watch for me.
This x100 and bolded. I'd like to go running with the sport watch while listening to music via BT and tracking my mileage on a map, ala Runkeeper. I can't do this on the watch alone. I also need to haul along the iPhone. (Unless I've got that somehow wrong?) That's just plain silly if true. So the watch is a very nice looking, secondary display for the iPhone. Until it has more standalone functionality I'll pass.