There's an article on Eurogamer titled, 'Microsoft to coach devs on how best to use Xbox One keyboard and mouse support'.
Personally I think it's a bunch of hot air. PlayStation has made mouse and keyboard support available to game developers for a long time, and hardly any of them has released any games that use it.
Here's what I posted in the Eurogamer comments.
I'm glad native M&K support is coming to consoles, but I think it's futile to try and seperate M&K players from controller players. XIM4 already proves how futile this is. Plus it splits the player base into smaller groups like paid DLC maps do, which is always a bad outcome.
Seems like Microsoft is attempting to introduce some sort of 'honor system' in order to protect controller players from M&K players. Requesting that the XIM4 players voluntarily stop using their devices and only play on M&K servers. I already know how that's going to turn out. Empty M&K servers with a bunch of XIM4 players choosing to join the highly populated controller only servers instead.