NFC is useful. When used correctly. (Part 1)
For payments and authentication. Secure payments and authentication. How secure NFC is debatable.
It isn't for anything else. Really.
Entertainment centers use NFC tags for credit management. But guess what they use.
One clue, this tech is 25 years old.
MIFARE Classic everybody! This type of cards has been broken since freaking forever. Just run mfoc and done.
This bugs me. There are more “secure” options. Server side auth with locked MIFARE Ultralight tags is an option. But people don't just use it.