…rules that are decades old persist without evidence to support the idea that someone reading an e-book or playing a video game during takeoff or landing is jeopardizing safety. Nevertheless, Les Dorr, a spokesman for the F.A.A., said the agency would rather err on the side of caution when it comes to digital devices on planes.
— Fliers Still Must Turn Off Devices, but It’s Not Clear Why - NYTimes.com