When you say net, are you talking about the larger wireless network idea, or the wider Internet? It would be rather expensive trying to get high speed links and routing systems in place to link them all. Wi-Fi's ok, but it's not going to be good for example:

location A has to go through 10+ networks before reaching location B etc... by the time you add up all the amount of users on networks in between.

BTW telecom have hotspots everywhere now here to. Probably charge a little to much here aswell.

I couldn't imagne how congested specturm is becoming aswell.