Anyway, I'm in a town with google fiber, but can't get more than a 30Mbit uplink on spectrum (which is actually faster than AT&T) because the only places in town with competition are the areas already served by google fiber.
It won't take much to kill these lumbering giants that refuse to invest in their infrastructure. Particularly given the ill will most people feel towards them.
It's also unlikely to directly compete with wired ISPs in cities, as the bandwidth required for everyone to have a terminal would be high. But it could enable unwired 5G stations as micro-ISPs, which would be a similar effect.
What it will kill are rural or undeveloped area ISPs (such as they are) and provide high threat to undersea cables and cross-country fiber.
Disclaimer: Never been a customer. Started my own ISP's instead.