Are any of these devices capable of running software that outputs the notes as MIDI, in a "follow the bouncing ball" kind of way? Or failing that, can either of them display MIDI notes generated by a sequencer sync'd in real time sync to the master clock?

IMO the Clavinova and the Tyros already have an excellent system for displaying music for "play-along." I'm not good at sight reading and sometimes I have trouble "reading ahead." Turning the page by hand is a guaranteed mistake or late note. So yes, I'm very interested in a system like this!