Real time feedback loops to help the world.
a) have a read of this, link from Wade(bit long but worth it):
b) watch this from a Multimedia perspective to round out the concepts
c) as I'm reading Arthur C Clarke's "The Light of Other Days" http://en.wikipedia.org/wiki/The_Light_of_Other_Days
it hammers the point home. Transparency. The multitude of data already out there. Our re-interpretation thereof. Intent. Information management and the integrity thereof. Interdependence demonstrated. Wake up. Welcome to the future. See the MESH. Feel the quantum foam ;)