Does anyone know or want to speculate... Will the Apple Watch function separately for certain tasks ? Specifically: I hate running with my iPhone 6 plus and it would be great if I could leave it behind, connect my blutooth headphones to my iWatch and start running. When I get back, have it sync health data to my iPhone (I understand no GPS or cell service during this time). It seems unclear whether or not this type of task would be possible with the iWatch. Also, any word on the accuracy of the heart rate monitor during levels of high activity? I purchased a Basis band when it first came out and returned it only after a couple days because it failed to accurately measure HR when I went above 130 or so bpm (pointless, right?).