Actually the US EMV route is Chip & Signature, not Chip & PIN. I read that US financial institutions were worried popping 2 new things on people at once - inserting the card instead of swiping and having to enter a PIN. It's still more secure than the mag stripe, but it has already caused headaches for people traveling to Europe with a US card with a chip thinking they would be fine. Many of the automated machines for train tickets, tolls, unattained gas/petrol stations, etc. are only designed for Chip & PIN.
One issue for NFC in the US is that it is limited to purchases of $25 or less. (In Australia, it's $100.) I think the fear there is if someone steals your card, they can do a lot more damage at $100 a pop, vs. $25. However, $25 might limit the places legitimate users would be able to use it frequently.