It happened with voice. There's no reason whatsoever to have a landline at domestic environment. With 4g the mobile internet reached speeds that easily surpasses most of the land connections, the main problem being data caps, but this problem is also arriving to land internet and being worked out in mobile with the next generation of connections like 5G.
I'm not talking about the infrastructure, of course the towers will still need cables to work properly. I'm talking about the final consumer.