Magmarock: I'm hoping this will give both the guys and GOG and consumers a heads up as to what's happening and also in hopes that it will speed up the patching process so that they might be work by the time Windows 10 comes out.
Dalswyn: A good idea, but when was the last time Gog patched a game to make it compatible with a newer OS?
I think they've updated quite a few games to work (better) with e.g. Windows 8/8.1. For instance Gothic (now removed, they apparently fixed a visual glitch visible in Windows 8) and Haegemonia. Well, the gamecard for the latter doesn't list Windows 8 even now, but IIRC it earlier refused to work in Windows 8 on anyone who tried it (me included), and later after some update it worked.
It makes sense for GOG to try keep their active games compatible also with new OSes, as otherwise new customers don't want to buy further copies of those games. Less so for games which have been pulled from GOG but are still available for those who've bought them earlier, e.g. Fallout and Gothic series. It might even be GOG is not allowed to touch those pulled games at all, so they will stay as is.