http://wccftech.com/halo-wars-2-crossplay-xb1x-enhancements/

343 Industries announced that Halo Wars 2 will soon enable Crossplay between Windows 10 PC and Xbox One players.

Fear not, though, as the main ranked playlists won’t feature Crossplay. Here’s the overview of what’s coming, including Xbox One X visual enhancements due to hit Microsoft’s upcoming console.