Comcast will have to follow market pricing
Here in Nashville, TN, market forces will keep Comcast GB services competitive price wise (already announced as being available here in 2016). Google Fiber is also rolling out end of 2015 and early 2016, and their prices are $70.00/month for internet, and full TV package, less premium channels is $50.00. Total $120.00 (plus taxes and fees). Comcast would be a fool to charge much more than that for the same services. Spoke with an installer/friend last month, he has the D3.1 modem in his house, so they're working on it in this market. I would presume that the other 4 markets that Google is building out, including the major Atlanta area, will also force Comcast rates down. The installer already acknowledged that there is that discussion going on now, system wide.