Genocide2099: I hope Microsoft would consider making their games available here on GoG. To improve their public image and all that. Wishful thinking. Probably won't happen.
fr33kSh0w2012: Actually It is now MORE then likely it will happen!
Maybe for say older titles if they signed a deal w/ GOG - sure, those could come to GOG from Microsoft. That would make tons of sense for those who like "owning" their games - and might help Microsoft get an audience (i.e. the DRM-FREE club and game-owning/archiving club) that want to own their games.
And by that time when a really old Microsoft game launches on GOG, it's likely that older games ain't super-duper pricey and piracy won't be really issue there b/c those games likely will be cheap enough for many to buy.
Expensive new games be the problem w/ brand-new $60 (base-game) to $120 games (with Expansions, Season Pass, etc) - which have DRM, anti-tamper DRM, online-only requirements, and other garbage attached to it, as they are hoping these things make you just go buy the game - which is why I think a lot of these dev's and pub's just don't bring stuff to GOG b/c of the DRM-FREE requirement that's here. Companies like Microsoft and all of them are trying to protect their games...or make it at least look and be perceived that they're protecting their stuff.
Plus, then...they (dev's and pub's) could get a double-dip on some games for those impatient gamers (like myself) that they don't remove DRM on with other versions (like say from retail, Steam, UPlay etc) and try to re-sell them without DRM on GOG.
At the least, I really see Microsoft sticking a lot of their older titles on Game Pass to boost the catalogue & the reasons to subscribe to Game Pass.
But, for newer titles: they're trying to really sell gamers on Game Pass, so...I really doubt many of the newer stuff would come to GOG anytime soon.