Dude, I hate to break it to you....but there is more to Microsoft than just Xbox. Hololens stuff needs to be developed before it launches. MS set up studios to do that. This is ok.
Im aware of that, but we've been down this road before with Kinect. They seem to have this fascination with some sort of gimmick, im not saying they shouldnt develop Hololens games, or that they shouldnt have developed Kinect games, they should but that seems to be entirely where their expansions go into - iirc Black Tusk when it was Microsoft Game Studios Vancouver were developing a Kinect FPS which got canned and they rebranded etc
We've seen this path before, now Big Park make apps, Good Science is... well im not even sure they exist anymore, Soho moved over to apps (Upload Studio is pretty cool so fair enough), Rare are now coming back from Kinect after great success admittedly, Lionhead went Kinect and their game absolutely utterly and entirely bombed.
Their first party studio size for regular ol' games is not that big, they dont seem to want to expand them to be multi-game studios and I dont think its such an entirely unreasonable thing to be a bit disappointed to see that yet again they expanding and its going towards yet more expensive add-on tech, especially as they say they want to be like Nintendo, yet are (imo) well away from doing that.