It's my experience that when fiber is in the area, it's good for everyone.
Here, in the NY metro area, some cable companies have to compete with Verizon FiOS fiber service. I'm outside the FiOS service area, but I'm on the same cable system that has to compete with FiOS in other towns. So, I have access to a 101Mbps tier of service. Here's a speed test I just ran:

This service level along with basic cable TV costs me $177 per month after taxes and other fees. Obviously, you're getting a lot more for your money on Google Fiber, but I can't really complain too much. Internet speeds and costs elsewhere in the state/country can be far worse.
Cable service a few towns up from me is provided by Time Warner who doesn't compete with FiOS in this county. Cost for their 10/1Mbps tier is $54 monthly. You can step-up to 50/5Mbps for an additional $50.
Competition is a good thing.