They don't even have one on the MacPro!
I don't think blood pressure is possible - everything I've ever seen for measuring it still involves a hand that tightens on your upper arm.
I'd like to see the watch be thinner, in addition to many of the things other people have already mentioned.
Lol. I just listed it because so many android users list that as a knock on the iPhone.
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Blood pressure would be great but I'm not sure how accurate that would be if possible.
As for thinness, it really didn't feel thick to me at all. But I've worn my nano as a watch many times so many be in just used to it. But it's only 1-2mm thicker than my old traditional dress watch from 16+!years ago.
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And USB port not to mention! "How am I gonna transfer files on it??"
Lol USB-C of course! Lightning is dead, Apple wants thicker connectors!!