ITU makes it official. Longer reach, reverse power, downloaded upgrades for the customer equipment, DTA over coax, and a dozen other improvements. The major chip vendors, Broadcom and Sckipio, are already hard at work. The carriers are hoping for equipment in the second half of 2017 but that may be a little early. The amendments extend the frequency range up to 212 MHz. That will almost double speeds on very short loops, such as the apartment buildings AT&T is planning to serve.
BT needs longer reach. Their finance guys insist they use existing cabinets rather than building to the distribution points closer to the customer. G.fast was designed for 50-200 meters but existing cabinets are often 350 meters away or more. The new standard increases the maximum transmit power up to +8 dBm, with a practical goal of 300 megabits 300 meters. AT&T has been vocal they want a true gigabit to compete with cable, not "up to a gigabit." Comcast is well along deploying gigabit cable to 40M U.S. homes.
The ITU has also started work on G.mgfast (Multi-gigabit.)