There is no such thing as an Xbox in reality anymore.
Activision-Blizzard-Zenimax are the new lead M$ gaming companies & they would have released these games irrespective of the ownership change.
M$ Windows will be the lead Gaming platform & the above mentioned gaming companies will be the lead Gaming Software producers which will be available everywhere.
Think of GamePass to be soon like EAplay,Ubi+ & all.
This good news. Full slate will come now since Sony dont see MS as competition, plus with Steam store access available on Next Xbox console PC hybrid system, all Sony games will run on Xbox devices anyway.
Win win for everyone.