By using spectrum more efficiently, there's more available for uses not yet accomodated. By managing use carefully, destructive interference can be avoided, not eliminated.

Too true that it took wi-fi to showcase demand. But the CB radio demand was huge too. All 40 CB radio signals combined use close to 50 times less spectrum than a single 802.11b channel.

Ultra wideband technology is new and untested. It has shown promise in multiple applications. Before we know if it's bandwidth brilliance or silicon snake oil we should study it a bit more. Especially if it will, in fact, interfere with GPS systems.

Spectrum is a public resource: it is ours. We should not sqaunder it, but manage it for the collective good.