A similar thing will likely happen if TWC moves too far down the path you've outlined; it will get to a point where customers will strongly resist and seek alternatives.
What alternatives? Cable is headed towards being a monopoly in a lot of areas as telcos give up on DSL. U-verse is capped and is already maxing out speed wise. Verizon didn't even deploy FiOS in the City of Los Angeles, let alone the rest of the country.
Google Fiber probably won't get deployed in my neighborhood in my lifetime even if they find it viable. -- AT&T U-Hearse - RIP Unlimited Internet 1995-2011 Rethink Billable.