The reason I think of this is that I recently came across this animation from New Horizons showing a 330km-high eruption that recently happened on Io:
http://en.wikipedia.org/wiki/Io_(moon)#mediaviewer/File:Tvas...
It's utterly captivating, at least to me, and I can't help but wonder what effect it would have on the public's imaginations to be able to see images like that every day, in high definition, from all over our solar system.