Pete Brown from Microsoft delivering a special A3E keynote on the Future of Audio from the Microsoft perspective.
Particular highlights are a mutli client and application, MIDI API. A refocusing of the audio stack towards low latency rather than battery life and control over isolation of audio processing onto a physical core.
Also AudioGraph looks like an interesting addition to the Windows development environment.
Additionally FLAC and ALAC codecs will also be supported out of the box.