interestingly, you see airlines moving away from in-flight entertainment screens in the seat in front of you, in favor of BYOD. A logical move: let the clients bring their equipment (they bring it anyway) so you don't have to (install, maintain, spend fuel on, etc.).
Now with airlines actually removing in flight entertainment, flying from the Middle East to New York can be quite a long trip: no laptop to watch a movie, no screen in front of you.
I guess the US will stop banning as soon as one of these policy-makers is on the same flight as a few bored kids ;-)