Besides, nobody is interested in doing mobile payments using Bluetooth 4.0 (LE), since the range or Bluetooth 4.0 makes it highly vulnerable to potential hacking. NFC's extremely short range (only a few centimeters!) is a more viable (and definitely more mature) solution for mobile payments by cellphone.
Baloney. Security is not achieved through the medium of data transfer (WiFi vs NFC vs BT). It's achieved through not sending anything sensitive over the airwaves in the first place.
NFC is far easier to hack BECAUSE of the short range. Crooks can install a reader directly under (or even inside) the POS terminal in the store and capture EVERY single NFC transaction.
With BT or WiFi there's a lot more "noise" going on. How do you tell which packets of data out of the hundreds flying around from various devices are actual transactions (with credit card or other useful information) and which are just garbage (people sending messages, checking mail, browsing, getting info from iBeacons and so on)?
With a sniffer under a terminal you know that EVERY SINGLE NFC data transfer you capture is an actual transaction. That information is going to be far more useful to crooks.
I think that NFC will take off once Apple implements it.
or it will fade away if Apple comes out with an alternate payment system based on BT LE.