The Windows version of Live will finally get downloads for the PC. Since it's release, GFWL has had nothing but add-on's for a few of the Live enabled games, but that's finally changing. Live will go Live on Dec 15, serving up the likes of Resident Evil 5 and Red Faction Guerrilla along with new Live enabled versions of games like World of Goo and Osmos which I assume means Achievements. Considering these games already have Steam Achievements, I'm guessing the only difference will be in name.
While it's late to the party, I'm glad that M$ is finally taking that foreign "PC Gaming" thing with more than a pinch of salt.