said by maartena:DOCSIS 3.1 is needed for 1 Gbit/s to houses over cable. DOCSIS 3.1 is not yet (but almost) certified, and the first head end equipment isn't going to be available until late 2015, with consumer modems being available in 2016.
Cox needs some time to implement and test, so the END of 2016 is a good estimate.
Actually it is the other way around. CPE will be available mid to late 2015. CMTS will be available in 2016 and/or later.
END of 2016 is still quite early.