My personal opinion, this wearable technology is fine but the implications for the future are not good if they decide to move past the "wearable" stage and into the "Implanted stage". Especially considering what the World Economic Forum at Davos 2016 said they would do with that type of technology in their own words, see video:
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Thanks for your opinion and posting this interesting video here!
How it works is that, they'll introduce it so subtly that people will clamour to have it just like atm cards