[grahamburger]

Note that I'm not necessarily arguing that this line of thinking (5g will obsolete cable companies) is correct, only that that's why mobile operators want it so badly - they want you to be able to drop Comcast and give them your money instead.

That being said there's absolutely no reason why 5G (or even 4G or low Earth orbit Sat) couldn't compete with cable companies on latency. In many places 4G is already lower latency than existing cable networks.

Edit to add: 4G also already offers fast enough connections for 4K and in many places 8K streaming. It's the total capacity that isn't there - they have to put data caps on so people don't do all their streaming on their mobile connection. 5G is more about removing data caps than providing faster speeds.