Microsoft has been working hard to unify its various platforms and bring a proper set of converged functionality. The last piece of that puzzle is the Xbox One, which was never overtly branded with Microsoft tags, and never followed the Windows line, but is being pulled in with the new Xbox One. There are still a lot of questions surrounding that move though...
Source: http://www.phonearena.com/news/Windows-8-apps-confirmed-to-run-on-Xbox-One-no-word-on-second-screen-controls_id48483
Source: http://www.phonearena.com/news/Windows-8-apps-confirmed-to-run-on-Xbox-One-no-word-on-second-screen-controls_id48483