Noise cancelling headphones (and I have a pretty good pair) actually making flying WORSE, IMHO. They cancel out the engine noise and allow you to hear every inane conversation, screaming kid, and tubercular passenger coughing up a lung with crystal clarity. That's the OPPOSITE of what I need on a flight.
I'm a fairly frequent flier, and I think everybody's life would be improved by a bit more enforced "shut up and read a book" time and a bit less Facebook time. Also, whose brilliant idea was it to allow cell phone use during taxi to the gate after landing, so every flight ends with a dozen iterations of the "NO, WE JUST LANDED! WE'RE NOT EVEN TO THE GATE YET!" conversation?