As seen in this article on The Verge (as well as in minute 3:38 of the above video), the Miracast Wireless Display app for the Xbox One allows for second screen WiDi projection with newer Windows devices.
With both the console and devices already allowing for WiDi connectivity, Miracast Wireless Display provides the ability to set-up a second screen display with easy to follow instructions and device settings.
I helped design the in-house MVP that was used for testing and vetting. We aimed for an app that would hint at our blue-sky ideas concerning experiential motion design and consumer focused messaging.