It wouldn't be a Microsoft conference without a bit of Minecraft, would it?
Looks like we have a whole new Minecraft-flavoured adventure coming in Minecraft Dungeons. It's a brand new game which looks to be a darker, more dungeony version of Minecraft, and it's coming next year – spring 2020.
It'll support four player co-op, and while the trailer doesn't give too much away it looks like there's a lot more focus on a dungeon-crawling experience rather than the building and gathering that Minecraft is most known for. You can see the trailer for yourself below.