Maybe this is the answer to the impending cabin baggage laptop ban. Carry a keyboard and screen in your hold bag, the phone with your data and applications in your pocket.
I keep hearing people say that technology can't solve political problems. This has never been more true than in this case. Instead of contriving ridiculously convoluted solutions to a non-problem we could simply stop electing politicians who propose implementing ludicrous airport security theatre.
THe problem here is that most of the public believes that security theater is real security. Unless that changes, most politicians will espouse their "firm positions on security" in order to help them get elected.
THe ones who "get it" tend to be in the independent/libertarian camps (last I looked) - and they don't get a whole lot of public support.