Microsoft: You don't get a headset with Xbox One, that's what the Kinect's for
The Xbox One Kinect
Look, you guys wanted a reason from Microsoft ot justify the extra $100 for the Kinect and they have delivered. In place of a headset, Microsoft just wants you to talk out loud to your online competitors. Remember the new Kinect is an incredibly powerful sensor and can weed out not just where you are, but also who's talking and what's just background noise. Ditch the headset, make the stuff intuitive. Naturally, this isn't a great fit if you're trying to keep it down – like in a college dorm situation – but it'll work so much better for everything else.