Media Presenter
picture multiple screens, or single screens divided by a grid, in each mini-screen the music is streamed using a different "lense".
We're used to the lyrics lense, but imagine seeing, streaming to the beat, piano roll, piano keys, chords, key changes, standard music notation, midi commands, etc etc?
The most fantastical music arrangement software i've ever seen is called Easy Beat.
Which you can use to score KAR files, which can contain all these elements in a single file.
Imagine using this editor to create CDG discs, or even more sophisticated multimodal media braids? kJams Presenter can read these files and present them on multiple monitors, or tiles on one monitor.