Of course not for older Versions of MS Windows - because people will have to love Windows 10 ?
lol, yep. I can see the pitch already. "So for those of you damn win 7 hold-outs who haven't been either forced to upgrade or persuaded to upgrade by us selling windows 10 minimum games only, we here at microsoft have a knockout punch, for those rpgers especially. Now, to play the new rpgs from your favorite developers, you will have to get win 10. Why? Because we bought the companies (evil laughter)"
But little did they know we still have a huge backlog, that could easily fill a year or two. Maybe even until linux (or something else new arrives) finally becomes the goto alternative for windows...