The MIDI Association is announcing at the addition of MIDI 2.0 capabilities to A2B, which is is a high speed digital bus, capable of distributing 32 channels of audio along with data.
More detail in the MIDI 2.0 thread.
ADDED : Hoping there will be specific announcements from some of the dozen plus corporations that are also members of the MIDI Association, for specific products that will support this new audio and MIDI standard.