It is curious what happens with facial recognition, since there are many cities and states that prohibit it, but at the same time its use is more widespread every day, and what is worse is that it remains unregulated.
Facial recognition is a great technological improvement that needs to be regulated, and since the authorities do nothing (or almost nothing), companies do what they can to solve their needs and in many cases use facial recognition to solve them.
The best known case is the way in which Apple allows its mobile phones to be put into operation, since they become operational by recognizing the face of their owner; and the positive part is that the information of that face stays in the mobile and is not shared by anyone, so it maintains the privacy of the user.
Another widespread use is in the access to airplanes at airports. They use the facial recognition of travelers so that they pass through the boarding gates with the maximum ease. For those who do not know, in the USA there are more than 180 airports that use this technology and the company CBP is one of the market leaders, but there are others and new start-ups continue to appear. It is an extremely active market around the world.

Photo courtesy of: da zheng
Facial recognition is also increasingly being used to access company facilities. A camera follows our face and allows us to pass if we are registered.
And the same happens to make a payment at a point of sale, to carry out a banking operation, etc…. Every day facial recognition technology is used more and more by almost all companies, except by the police, since even in democratic systems, citizens feel totally defenseless against its possible misuse.
And the cause of all this is the lack of a clear regulation known to all that ensures our privacy, and that no one abuses our biometric data, now and in the future.
Where this is not the case, is in China and other dictatorial countries. There, facial recognition is widely spread at all levels and Chinese companies export their technologies all over the world. Both cameras and recognition programs.
Every part of the world has its peculiarities, and companies take advantage of them as much as they can.