Play legato style (if your synth supports it) in microtonal tunings as readily as you do in twelve equal. What else - make fibonacci rhythms which are highly structured, but never repeat exactly. Make polyrhythm metronomes. A mouse theremin which can ...
Play a major scale on your MIDI controller, and the software responds with an exotic microtonal cluster. Play a few more notes, and it responds with a soft, delayed version of the melody at a tempo determined by your playing Velocity. When you pause ...