Epic read – and makes me wonder how long fixed services can truly survive. These kinds of speeds with little infrastructure surely scale better for those making the money, and are easier to implement for consumers too.
The same is true of wireless networks today. An 802.11n wifi network is also limited by the number of clients, even if none of them are consuming their share of bandwidth.
If you aim well enough, that finite spectrum is only shared by a handful of clients.
Personally, I wish I could get a decent 100/10 fiber connection in my area just for the latency advantages over DOCSIS alone (it takes roughly 10ms to even get out of my ISP's internal network onto their transit provider).
Latency's going to be a real bear if it takes off and multi-user applications prove popular.
42GB for $250 = $6/GB.