IoT devices or humans?
A Swedish rail line can now collect fares by scanning its customers for embedded biometric chips. The primary benefit is the elimination of a physical ticket—plus it’s harder to lose. It sounds futuristic, but my dogs have been sporting embedded chips for over a decade.
If you think about it, physical tickets are kind of silly. They are a surrogate for the person. The practice of scanning a ticket instead of a person was likely established when there just weren’t many viable alternatives. Technology now offers a more direct approach.