When hosting an hybrid event, some people are at home behind their desktop en a few people are in a workshop-room, with a big screen probably touchscreen, several camera's, a way to increase the interaction and participation of the people in the workshop-room would be to have a simple phone app with which they can add sticky notes to the bord, participate in voting and probably do other cool stuff, without staring at the big screen all the time and watch one person use the touchscreen.
I would love to see such an app!
Just a voting function would be awesome, great idea.