The world is certainly changing. A fingerprint front door lock. Think of the number of times you have to answer the door because the kids want to come in and out. I thought these things were so advanced and expensive that they were only installed in the type of high security places which you would see in films.
I'm sure that they have many other uses as well, in appartment blocks with a common door etc. You wouldn't have one tenant giving keys to all their friends. Also when they left, their prints could be erased so they couldn't get back in easily.
Murt