80% coverage at Comcast leads the way
By 2019-2020, more than 100M of America's 133M households will be able to get gigabit cable downstream. Comcast, the largest with 54M homes passed, is at 80% today and headed close to 100% by yearend. The second largest, Charter with 49M, is beginning to turn on the gigabit and will be deploying heavily in 2018 and 2019. #3, Cox, is planning complete coverage soon.
About 40M will be able to get 1 gigabit symmetric from the telcos. Verizon has essentially frozen at around 15M, which AT&T intends to match by 2020. Millions more are fibered at smaller companies.
The upstream for most cable will be 5-20 megabits, with a few able to receive 50 megabits. Higher cable upstreams will mostly wait until 2020 or later. John Chapman of Cisco tells me full duplex DOCSIS will yield hundreds of megabits upstream initially and gigabits eventually. He expects first units in 2019 and volume in 2020.