Om Malik of GigaOM comments:

Google is obsessed with the idea of connecting more and more people to the Internet, especially in the developing world and there isn’t a single technology that can get it done. So it has been toying with many ways to provide connectivity in areas that are un-connected.  While I don’t have any doubts that Google’s mission to connect the world is mercantile, I still find the idea of pushing for seamless connectivity exciting.  Seamless connectivity, as you know, has been a bit of personal passion for me.

Read more at: Google’s Balloon-based Internet Dream: Loon or Loony?