This week's conference included a slew of new announcements on Microsoft platforms. You can see the complete list of recorded sessions on Channel 9, but here are links to the gaming and DirectX related talks you may want to review.
Building Games for Windows
Direct3D 12 API Preview
Innovations in High Performance 2D Graphics with DirectX Across Windows and Windows Phone
DirectX Graphics Development with Visual Studio 2013
Understanding the Xbox One Game Platform Built on Windows
Building Your First Windows Game with Unity
Visual Studio: A number of the announcements are related to Visual Studio 2013 Update 2.
Windows phone 8.1: With the announcement, we've updated DirectXTK and DirectXTex to support Windows phone 8.1.
Windows 8.1 Update: This announcement covers a number of improvements coming for Windows 8.1 in KB 2919355 starting on April 8, 2014. Note that Windows 8.1 Update is a mandatory update for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2.