Anything that helps be get rid of the stuff I carry in my pockets is cool with me, I would use it. The problem is, will I be able to use it everywhere or still have to carry around cards. If I still have to carry cards because not everyone implements it, then forget it, what's the point?
I couldn't have said it better. It seems cool to pay at Starbucks or McDonalds with my phone, but if I still have to carry a wallet because the majority of business don't use NFC then it's pointless. The tags thing wouldn't be useful to me either. I have 20 seconds to alter my phones wifi, sound, noises, settings... when I get to a new place. I don't see how NFC would be anything more than a cool feature 0-5% of the people use. Apple does have a way of surprising us though!