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Re:Google’s fiber effect: Fuel for a broadband explosion by pwarner on Monday May 05, 2014 @02:08AM (#7697117)
A reasonable article on how cable companies can respond.

http://arstechnica.com/information-technology/2013/12/why-co...

tl;dr: by using more spectrum in the coax cable can get pretty fast... So pressure from Google should get them to crank up the speed sooner than later.

Re:Google’s fiber effect: Fuel for a broadband explosion by ihsw on Monday May 05, 2014 @11:53AM (#7699250)
As mentioned in the article, this requires a DOCSIS 3.0+ modem, and there are costs to rolling out equipment. Cranking up the speed isn't simply a matter of turning the dial on their end.

However you are correct that coaxial cable has plenty of room for improvement with a cost that pales in comparison to rolling out FTTH.