How about LightRadio Cubes?
Besides making cellphone towers obsolete, they're supposed to make it feasible to bring internet service to rural areas and undeveloped countries. You run your fiber and an electrical source along utility poles and put a Rubik's-cube-sized box or array of boxes on a pole to provide wireless service to the area.
I think a cube can handle 330 Mb/s. Whether it's a private company or a local government, wouldn't this technology reduce the startup and operating costs of bringing service to people?