You are misinformed.
To your first point, the WiMax cards/adapters will be available shortly before the services are launched. If you could buy one today it would not help you...right? Manufacturers of laptops and other devices have already signed up to embed WiMax the same way they have embedded WiFi.
To your second point, the Cities will not need to license ANY spectrum, that is accomplished by the carriers. A much overlooked fact of the Sprint Nextel merger was that the merged company owns a national footprint in the 2.5Ghz spectrum...it was the reason Verizon and others fought the merger so strongly.
WiMax is the future of mobile computing.