Does that involve cancer causing death rays and does it simultaneously reveal your true gender?
Read about these systems in the very late 1990’s.
In 2007, I was watching TV when this commercial came on.
https://www.youtube.com/watch?v=eob532iEpqk
I have not seen them in the USA but there are various versions such as the thumb-print payment, but regular checkout.
They’ll get rid of all cashiers, eventually. End of that particular labor cost. Makes theft more difficult.
I have not encountered one of these systems in the USA yet.