The problem with having an approachable face and earbud headphones is that people will come up and talk to you, encouraged by the former and oblivious to the nearly-invisible latter. Your moment of musical bliss is interrupted by someone mouthing Which way is Houston Street?
But wear a pair of these, and there's no mistaking that you're not to be interrupted. Nikon's "can-style" Media Port UP headset plays music and offers wi-fi internet browsing throught the flippable eyepiece, not to mention two hours of video viewing. And if someone steps to you, for maximum rudeness you can flip the eyepiece into place while your exposed eye glazes over.