Google is just cool, that's all I can tell you. Google has I am sure 1000's of projects on the go and many are just for the sake of trying. Google just released Loon, Loon is basically 'balloon net' - how cool is that.
Loon for all.
BALLOON-POWERED INTERNET FOR EVERYONE
Many of us think of the Internet as a global community. But two-thirds of the world’s population does not yet have Internet access. Project Loon is a network of balloons traveling on the edge of space, designed to connect people in rural and remote areas, help fill coverage gaps, and bring people back online after disasters.
Project Loon balloons float in the stratosphere, twice as high as airplanes and the weather. They are carried around the Earth by winds and they can be steered by rising or descending to an altitude with winds moving in the desired direction. People connect to the balloon network using a special Internet antenna attached to their building. The signal bounces from balloon to balloon, then to the global Internet back on Earth.
Check out the site to learn more about this high flying project: http://www.google.com/loon/