I'd love to see digidesign DirectConnect support, ideally even HTDM.
Imagine running live as a ProTools plug-in window, total recall of the live set with the Pro Tools session...? That's what HTDM could do, in addition to audio streaming.
Note: Keep OMS available in this setup to enable the use of a separate sequencer computer (Logic, Cubase,...) with Pro Tools as your mixer - for all of us who don't use the Pro Tools MIDI sequencer (does actually anybody...?)