This is a rah-rah article about NFC, provides a nice introduction to the topic, and explores other possible applications.
My thoughts range the map: is technology like this going to impact people who lack smart phones and online payment creds in an unfair way? Will default identity setting on these devices drill into your email, facebook, or phone provider profile? And even if you have a preview of the transacted data, you still have dialog-box-fatigue (think UAC).
RFID tags are not, to my knowledge, recyclable. NFC tags…another bit of disposable trash? That’s pretty insulting, there will be a billion of these things printed in no time at all. And like used hard drives, NFC tags are going to be brimming with personal information. Take the healthcare example in the article – what do you think a bitter hospItal janitor could get for ten of those tags? A hundred?
The thin profile of these makes them effortlessly transportable.
Other security implications would probably come in the form of proxy tags: someone is going to come up with a man-in-the-middle tag, and hide it as a transparent vinyl sticker or a strip magnetic picture frame they walk up to once a day and glean the stolen data by swiping their phone over it. Or they mod an RFID tag and just walk by it with a bluetooth RFID tag reader on their pocket.
Much scrutiny needs to be applied to these NFC interactions, as RFID enabled passports has already taught us.