That said Valve is pretty serious about their distaste for Windows 8.
Valve: OpenGL is faster than DirectX — even on Windows
It is actually reasonable future that Valve might release more games in near future that run in both Linux and Windows. Linux supports OpenGL.
Ubuntu is a form of Linux:
Most PC gamers do use Windows nowadays. There have been some tries of Dx 11 on Linux, but most tries have been simple demos. Anyway it is an effort that depends on game developers and it has been more popular to support Consoles and PC with the same game.
As a little teaser lol Valve releases a super good new game in near future that supports Windows XP, Windows 7 and Ubuntu Linux version, but not Windows 8 . Honestly I find it unlikely(not impossible ), but Valve seems to be the game developer company that is in public statements most negative of Windows 8. I really do not look forward to work with Windows 8 in some day in the future either.
Edited by Stargate, 26 December 2012 - 01:34 PM.