At GDC 2017, Microsoft announced the new Xbox Live Creators Program. This program is an initiative designed to give developers an easier time releasing games with Xbox Live functionality across Windows 10 and Xbox One.
At Build 2017, the type of functionality was revealed. Andrew Parsons, Senior Program Manager for Game Developers at Microsoft took the stage for a session called "State of Play: Modern game development." It was then he explained that the Creators Program will give developers the ability to enable all Windows Features on the Xbox One, which includes full keyboard support.
This could benefit certain sectors of the development community, allowing mouse-heavy genres to be more easily programmed and even played on the Xbox One.
However, Microsoft engineer James Yarrow added that there is one major obstacle to this plan. He noted that support for a mouse "probably won't work." Upon further clarification, he stated that most models of mice won't be compatible, but Microsoft hopes to add support over time.