I said that it was technically possible to support cross platform multiplayer between Windows 10 and Xbox One, but at the time that was not announced/confirmed for the game.
AFAIK this is still planned, if possible. I'm not involved in that directly, and have not heard anything else about it since that article.
The next console patch will need to be released, at least, to bring the Xbox One version up to par with Windows 10. If there are any additional updates to the PC version, that would get the versions out of sync again (at least for awhile), given the much more elaborate patch process on consoles.