For people with Comcast Xfinity service, they offer a lot of WiFi hotspots. How do they get that coverage? I'm pretty sure they're using their cable modems that customers rent and setting up additional networks. That cable infrastructure is extremely valuable when it comes to providing wireless services.
https://www.fastcompany.com/3039682...ur-homes-internet-part-of-the-sharing-economy
Coax, as a communications channel will be strong for a while. Docsis 3.1 provides 10Gbps down 1Gbps up theoretical capacity. I worked on a product that a big internet company was looking at for a nascent wireless gigabit network. Not sure where it went. I'd love for that technology to take off, but it seems like there are more hurdles than I thought. Coax is already installed and medium capacity (not fiber, but worlds better than twisted-pair). Problem with coax is the cable companies you have to get service from.