Microsoft does seem to be trying to push Windows 10 and the Windows Store as a gaming platform and it looks like pretty much all of the Xbox One's exclusives save maybe the Halo series will be releasing on PC as well for the foreseeable future. Given that fact, it does make the Xbox One kind of pointless if you have a decent gaming PC unless you're a huge Halo fan.
Do keep in mind that some of the ports for these Xbox exclusives have had issues eg. Quantum Break running poorly in DirectX 12, and Forza Horizon 3 having performance issues if you don't have fairly high end hardware. Gears of War 4 seems to be the only Xbox One title so far that hasn't had major porting issues and/or problems at launch. For that reason it might be worth keeping the Xbox around if you don't have some fairly high end hardware in your PC to brute force those particular games.