Demos double frequency G.fast and cDTA with Deutsche Telekom. Adtran only claims "gigabit rates" but the technology is designed for over a gigabit and a half, combined upstream and downstream. I infer from their comments they are ready to ship. They also claim good performance from DTA, rapidly shifting upstream and downstream ratios based on traffic demands.
Sckipio's supplying the chips for cDTA, according to Richard Chirgwin in The Register. With the DTA now working on ordinary twisted pair. Telcos to claim "effective speeds of 500 upstream, 500 downstream." G.fast from fiber to the basement or wireless to the rooftop now outshines gigabit DOCSIS, especially on the upstream. Few cablecos are likely to improve their upstream significantly before Full Duplex is ready next decade. Verizon is heavily advertising their 50/50 & 100/100 Fios speeds because the higher upstream is winning customers.