Its a little strange that all of the promo pictures on the site are of male arms. I wonder if it was on oversight or if they really are only going after a male demographic.
I assumed that they used only large arms to make the device appear smaller. On a typically sized woman's arm, I suspect this thing would look quite hefty.
The fact that it seems to be relatively large may unavoidably limit its appeal to smaller individuals of either gender.
Do you think that a smaller version might make the interface unusable? I wonder if they are keeping it that large because they cant get the insides smaller or because it would not be easy to use.
I suspect it's the smallest they can do while still meeting the technical requirements.
There is definitely a size below which usage would suffer too much for many people, but such a device doesn't need a very large UI, since most of its utility is in displaying small bits of information quickly, and extensive data input is performed better on a phone anyway.
The fact that it seems to be relatively large may unavoidably limit its appeal to smaller individuals of either gender.