imagine if all radio spectrum was like Airport

David Weinberger is:
You can't just start up your own radio station because you might be interfering with, say, the batch of spectrum used to dispatch emergency vehicles. Besides, if everyone started up a radio station, the signals would be overlapping right, left, up and down. So, we need a centralized chokepoint to divide up the spectrum rationally.

Except put that in the past tense. New technology can do real-time negotiation of spectrum, seeking the optimal wavelength the way Internet routers seek the best next hop. Assigning fixed bandwidth necessarily means wasting bandwidth, like keeping cars locked into assigned lanes even if the result is bumper-to-bumper traffic in one lane and empty lanes on either side of it.

In effect, we can do to spectrum what the Internet has done to networks. By putting all the intelligence on the edges, the network can support maximum innovation.