I think it's interesting how so many people are trying to tear apart the secure nature of NFC payment with talk of working of sophisticated NFC sniffers, phone hacks, and finger print samples and duplicates.
While they're so busy trying to prove its possible, they completely miss the fact that it is significantly easier, and more likely, that a thief will lift your wallet or purse, and not only get your credit card, but your ID, cash, and other cards and personal items.
I've read tons of stories about people proving Touch ID can be hacked, but not one story of it happening in the real world. Same goes for NFC payments. People need a little dose of reality and perspective here.