I am a fanboy, I just happen to really hate Tim Cook and think he is doing a terrible job, Even Jony said Jobs left a road map of where Apple is going for years to come I would imagine that the Apple Watch was his idea and all, Tim is doing nothing at Apple but still following the road map of jobs he is nothing more than an errand boy trying to maximise money. While incredibly talented people around Tim make products - you think Tim Cook could have come up with an iPhone or Mac? Hell no, he is a business man and look where that got Apple before. And yes I agree with you, Apple Watch is v.1 AS I SAID, it has potential, that's what I meant the watch now, IS terrible is doesn't do much that say a 100£ Fitbit and iPhone in your pocket would t get you. But in the future - man is it going to be a game changer!! And I'm so excited about that!
As far as how would it measure your blood pressure that's a silly question really, I read in the rumours that it could have that by the strap measuring the blood flow through your wrist (I'm sure there are lots of ways this could be done, just because you can't think of a way it couldn't be done doesn't mean it couldn't have it?? What an ignorant point to make!