[Question_Assumptions]

I'm not sure I buy all of his arguments. If I open a pinhole in a dark room, I'll get an image on the other side. True. But if I also fire a laser, an arc lamp, and a strobe light through that hole, am I going to be able to see anything? I'm willing to believe that more can be sqeezed across the bandwidth than is currently being sent but I find it difficult to believe that if this were so simple, the telcoms wouldn't be using it to, say, increase the bandwidth of fiber optic transimissions under the ocean.

[eno_]

It isn't "simple." Software-defined radios are not simple. But they are now cheap. Such radios, and mesh networks, and other innovations should break the FCC/LamstreamBroadcast/CellularTelco spectrum monopolies. And that would be a very good thing.