looking at your screen while aiming at a QR code look makes you look like a nerd.
best reason for nfc
i think there will be a very good use case for bitcoin+nfc since it is basically a very ad-hoc data network. it could work with two "contacts"
first sends payment request, user takes phone authorizes it,
second nfc sends the transaction directly. (so offline TX are possible)
or alternativly: user pre-authorizes nfc (by pressing a allow max 1/10/100 btc to be transferred) then phone+POS exchange all the information needed, exact amount, address, transaction.