Because some of us use our earphones on more than one device. For example, I use them regularly with my computer for audio/video conferencing and music, my iPhone, my company phone (which is an Android), and with the inflight-entertainment on airplanes, which means I'd have to constantly take the adapter on and off and hope not to forget or lose it somewhere. It's just a pain and for what? If we can believe this analyst, it's to "upgrade" the internal speaker which of course will still sound like crap like all phone speakers.