Re: full undivided attention of everyone on the plane is required
"Yes. There is just one issue with this, the airplane is full of electronics. Now many even have LCD screens that make a lot of radio noise on there own, in the power range of 0.1mW and up to 0.5mW at low frequencies. They are all turned on during takeoff and landing."
THOSE were tested by the FAA and FCC prior to them being allowed on aircraft. All of them have had their radiation checked to make sure they don't interfere with aircraft electronics, and each new one installed has to be tested for the same thing.
Technically, for ANY electronic device (and even devices not designed to transmit WILL transmit, see Title 47 CFR Part 15) to be useable on an aircraft, it has to be subject to the same stress tests. However, cell phones and other consumer electronics have such high churn that as soon as a device is tested, its successor is on the market, which will now need to be tested itself, ad nauseum. And all carriers flying in the US MUST submit to them in order to operate in the US. And the FAA has the power to make demands of these carriers (that's how Airworthiness Directives work). See the problem?