Probably not because of patents, but because NFC is pointless
It is and always has been a solution looking for a problem. I can already charge up to $50 in a lot of places on my credit card without a signature, of course no PIN, and no "smart" features on my card. Just a simple swipe! What is NFC going to gain me, other than the possibility of someone skimming my card information without even having to pick my pocket?
Whether Apple adopts it is irrelevant, even Apple's support couldn't make it a success at this point. The real story here is about Apple adopting their own payment scheme, but that's not unexpected. There's a lot of money in payments that the card companies / banks / processors are currently raking in, and everyone wants a piece of that juicy pie. The retailers want a piece as a way to lower the cut they pay. The makers of cell phones and cell phone OSes want a piece because they figure everyone is carrying their phone around, so let's figure out a way to make them want to pay that way and earn us money. The carriers are thinking the same thing too, of course. Then you have big internet companies with lots of users like Facebook and Amazon looking to get involved. Yes, Amazon - I just read about it recently, though I can't see how they think ANY retailer is going to accept Amazon payments when Amazon is their biggest competitor!
In a few years there will be a lot more ways to pay for stuff, but most retailers will only support some of them. In one place you can use your Apple payments but not Samsung payments, in the next you can use your Google Android payments but not your Verizon payments, in another you can use your Facebook payments but not your Amazon. One place will accept Bitcoin but not Dwalla. it will be a giant confusing mess and frustratingly for all involved most people will end up sticking with the traditional way of paying using a bank or credit card because they'll know it is accepted everywhere.
FWIW, I did read a rumor that Apple is going to add NFC support to the iPhone 6. Yes, same rumor as about the 5S, 5, 4S and 4. The claim this time is that it is big in Asia and they need to have that support or they'll lose market share. I haven't been to Asia in many years so I don't know how true that is, but there are already solutions for adding a "NFC case" to an iPhone so there seems little need for Apple to add it to the phone itself.