It all boils down to the tradeoff between convenience and security.
I don't think it is particularly easy to replicate a living hand with all the blood vessels.
And it is not particularly easy to get a NFC ring with a secure element compatible with payment terminals.
I thought that the engineering team at Amazon did a great job with Amazon One. I wish someone could pick up the tech and carry on.
It all boils down to the tradeoff between convenience and security. I don't think it is particularly easy to replicate a living hand with all the blood vessels. And it is not particularly easy to get a NFC ring with a secure element compatible with payment terminals.
I thought that the engineering team at Amazon did a great job with Amazon One. I wish someone could pick up the tech and carry on.