@OP:
Great news! Now it could be time for Valve to make Half-Life 3 and get the most out of it about sales, image return and to show the new graphics, physics and other features. With all that's cooking at Valve, I'm not surprised MS suddenly woke up about PC gaming. But it's too late, thanks to Android, OpenGl has already become the most widespread graphics library, and Valve will be its Trojan Horse to become strong again on PC too. Devs not paid to stay MS-exclusive will start finding a lot more attractive cross-platform APIs.