That’s true for most of the country — it’s either the phone company (DSL/fiber) or cable (coaxial). Google Fiber is a good product with some concerns:
(1) I don’t like giving Mtn View even more control of the Internet
(2) Right now, they’re well-behaved, but who’s to say they won’t use their status as an ISP to push Google’s service to the detriment of competitors?
(3) They seem to want to go with a sort of wireless hybrid system in future vs bringing fiber to everyone’s doorstep. Fiber is nearly 100% reliable, wireless Internet … less so.
On the other hand, they seem less Kentish than most ISPs about permitting home servers and serverlike devices.
