"Apple folk can already use AirPlay to stream pictures and video to their Apple TV boxes."
And music. Or just mirror the screen if desired.* And not just to Apple TV boxes, there are many non-Apple speaker systems, AV boxes and more that can receive Airplay. How many TVs have NFC?
Although it might take 2 or 3 taps on the idevice screen to turn on Airplay, you do not need to get up and walk across the other side of the room to do it! The receivers just need to be on the same network as the iDevice, no real 'setup' required.
*yes, yes, a 'newer' Apple device is required for mirroring, iPhone 4s, iPad2 or later
And as for NFC payments, unlocking doors, etc how long will it take for the underworld to develop a cloning device? (I would not be surprised to hear that one already exists!)