I'll Be Watching You ...

Every breath you take
Every move you make
Every bond you break
Every step you take
I'll be watching you.

This technology is going to keep spreading, and it is going to become harder and harder to avoid it.

And it is easy to imagine what a tyrannical government could do with this kind of technology.  If it wanted to, it could use it to literally track the movements and behavior of everyone.
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And one day, this kind of technology will likely be so pervasive that you won’t be able to open a bank account, get a credit card or even buy anything without having either your hand or your face scanned first.