I don't know about a "killer use case", but I use NFC on my Nexus 5X all the time with my Yubikey Neo or to check the balance on my transit pass. I'm surprised

I don't know about a "killer use case", but I use NFC on my Nexus 5X all the time with my Yubikey Neo or to check the balance on my transit pass. I'm surprised iPhones were missing this, its not killer but its definitely useful.