Jason Holtman, who spent eight years of his life for making Valve's Steam digital distribution platform great, is now working at Microsoft for making PC gaming better.
Valve is distancing itself from Windows, making efforts to build for Mac and Linux, drawing up blueprints for its own Steam Box game console, and launching the cross-platform Steamworks SDK to provide Games for Windows Live-like features (like online matchmaking and license key activation) without the need for Microsoft. Just today, the publishers of Batman: Arkham Origins and Ultra Street Fighter IV announced they were dropping Games for Windows Live in favor of the Valve alternative.
Source: Gamesindustry