http://wccftech.com/keyboard-mouse-work-on-xbox-one/

Xbox One users have long been asking for the console to have keyboard and mouse support in games, while Microsoft has long been saying that it will happen someday. This time, Mike Ybarra repeated that they are still working on implementing this feature and commented that they already have an idea on how it will work.

During the Xbox panel in PAX West 2017, Ybarra said he is aware of people’s concerns about users who have asked for keyboard and mouse support. He also made it clear that titles with support for these accessories could be announced very soon.