I’m not so sure. Maybe if I could take a hardware booted system and have a midi-triggered macro that would login and launch GP, that would be useful. I’m hard pressed to think of another thing I’d need in a live performance situation to have control over my PC with. For home development use… sure… a midi surface control to switch between applications like a DAW or browser would be better than grabbing a mouse.
I’m personally not looking to run truely headless as I find the extention GP Select really useful for displaying charts.
Bome Midi Translator Pro for Windows can do the same “midi event to keyboard/mouse macro” things. I’ve used it in the past for things like having foot pedals turn pages in a PDF viewer.