Developers have revealed that the apple watch will last up to an incredible 3 hours of being able to tell the time. And if you don't actually need to tell the time but just want the watch to be able to track the time, with it's screen off, you can time for an incredible 19 hours!
I know Steve Job's is pissed off somewhere. He knows what the apple watch could have been. Being able to have just three to four hours of displaying time is a step backward especially considering rumored slow charging time and competitors watches lasting up to 48 hours of screen on time telling.