It has its advantages, but it doesn't do much for consumers, except in some pretty extreme circumstances or dense areas. (Stadiums are a popular example, which, okay. I lived across the water from a stadium and my 3G phone signal sucked when there was something going on there. This got way better as my carrier got less bad and technology improved and the stadium added free wifi, but it's definitely a good problem to solve). It'll help other things more. Someone pointed out 5G could be a big thing for flying drones, in a near-future alternate universe where those are prolific, and there's quite a bit of interest in those. Trouble is a use case like that needs the infrastructure. So, everyone else is going to subsidize it by buying vastly overspecced phones, but that's the mobile industry in a nutshell.