At GDC Microsoft took an angle with their presentation that puts focus back on gaming on PC and Xbox. To that end Microsoft are bringing two of their key console ventures to Windows 10.
The first is the ID@Xbox program, a way for independent game developers and studios to produce and self-publish their games for the Xbox consoles. Now Microsoft are expanding it across to PC to help the same developers bring their new games to PC easier than before.
The second is the Xbox Live SDK which is going to be updated to account for development on Windows 10, part of Microsoft's recent push to make universal apps that work across Windows computer, consoles and smart devices.
This is on top of the fact that all Xbox accessories going forward will be made compatible with Windows 10 as well as a wireless adaptor for the Xbox One controller being released.