The FAA's role is to be extremely cautious. Aviation's one of those things where minor mistakes can have disastrous consequences. Same kind of thing as with medical devices: they had better work, perfectly, every time. And since individual components can fail, the backup systems also need to just plain work. The more outside factors can interfere with the system, the harder it is to analyze down to some large number of 9's. So don't expect the FAA to move quickly when it comes to authorizing any changes, including RF that might or might not be generated from the cabin. Given the wide range of consumer electronics, they want to make sure that the worst case scenario won't come close to generating problems for the avionics, particularly during takeoff and landing. They'll get around to it, but only after doing lots of homework. I wouldn't want to fly on a plane whose owner is allowed to cut corners on safety; the airlines would do everything they could to save money.
The internet is a very different kind of system, and the role of government regulation is different. I *do* want government regulation of the form that protects us from "regulation" by private service providers -- things like upload/download limits, preferential treatment for certain kinds of content, functionality with all devices (I don't want to be told that I have to run Windows, for example). Net neutrality requires either effective government regulation or real competition, and for some strange reason, real competition in telecommunications doesn't seem to be a stable situation. Look at what's happened since ATT was broken up; the industry has reconsolidated around a couple of big companies that seem content to divide up the pie rather than seriously compete with one another.
Chattanooga, Tennessee is doing very nicely with public internet. Around here my only choice for fast internet seems to be Comcast, with its high prices and 250 GB monthly cap (I ran a script on my system, and found that it's not hard to hit half of that, on a much lower bandwidth DSL line). Verizon hasn't bothered to build out FIOS to my area, and while that may be fast compared to most of the US, it would be very slow in Chattanooga (or many other countries).
I just don't believe that that kind of situation is going to get fixed without government regulation. Google is in the process of building out Kansas City (?), but that kind of piecemeal approach isn't going to solve the broader problem.