Sounds indeed interesting, I'd guess loads of people here could also come up with loads of ideas.
Clothes, worn by different people, interacting with each other would be a suggestion from me.
A t-shirt responding to sound/music would be another.
I hope democratized won't mean the clothes you wear do nothing if 6 out of 10 people
decide yours shouldn't. 
But, as others already asked, what... are you looking for in a participant ?