While I am not a big fan of using my phone to pay for something, I am looking forward to working with the Peer to Peer capabilities of the NFC chip in the upcoming Iphone6.  I know that some android devices have had this capability for a while, so I am interested to see what Apples response is.  It does appear to be easier to implement and use compared to Bluetooth LE devices.

http://venturebeat.com/2014/09/03/iphone-6s-nfc-chip-may-do-far-more-than-just-mobile-payments/