Can you imagine yourself doing your grocery shopping and when you arrive at the till, you pay only by putting your finger on a finger print reader?

According to this spanish article, there is a trial in Germany that seems successful enough to be extended to hundreds of stores.

Apparently the system is found useful by elderly people who don't have to memorize pin number, or fiddle with coins and notes.

The drawback is that it is one more company to hold your payment details.
In other hand, being brick and mortar, they are not going to disappear the next day.

Source: faq-mac