In the Bay Area Megapath competes with Comcast by offering the same exact connection but much better service with value added options like proactive monitoring. The same physical line in the ground will get you internet access. They will almost always cost more than Comcast, but it is worth it to many people to not have to deal with automated phone systems that waste your time and ineffectual support.
Right, so what you see is in areas where people have a choice, Comcast rationally decreases prices and increases service levels. That's the entire logic behind Google Fibre. But for most of the country, there's literally no choice of broadband and there's no incentive for Comcast to improve.
