It seems some in this thread are missing the point -- Rather than becoming a large ISP, I think Google is looking to see what a community can do when everyone has a symmetric high speed connection. The products and services Google sells (aside from Fiber) are enhanced when used over an unrestricted medium. Additionally, the project manager noted in the live presentation that a highly connected community presents unique opportunities to similarly connected businesses.
Current providers across the US are strangling technological innovation; Fiber seems to be a testbed for Google's product development teams.
Pleasant Hill, MO
"presents unique opportunities to similarly connected businesses"
I'm considering opening a computer related business in KC because of this when I get done with my CS degree. Granted I have a bunch of other CS major friend who are with me on this so its not like I'd be on my own so that may add to my wanting to do it.
reply to snsr
All google needs to do is provide you with an IP address and gateway, there is nothing more them or any other "ISP" needs to do for you to use the entire internet to its full glory.