Biometric Passenger Authentication.
Already at several airports in the world, biometric passenger authentication systems are being introduced. This simplifies and speeds up the registration and boarding process. Thanks to these technologies, passengers will feel more comfortable at the airports and get more positive emotions from air travel.
So we can see that now aviation is the most developed field, although these technologies could be used in any tourism sectors. For example, renting a car, or booking a tour, or checking into a hotel. One of the important factors in the introduction of such technologies is that a tourist will not need to carry documents, and therefore the risk of loss or theft will be reduced.
Details can be found in this article: https://www.biometricupdate.com/201912/veriscan-biometrics-surpass-1m-air-passengers-processed-as-japan-jamaica-sweden-add-checks