One use-case is that LTE/5G are becoming increasingly attractive as a replacement for land-mobile radio. It used to be sort of common for major cities to have commercial MotoTRBO/OpenSky/iDEN networks for all kinds of business users that wanted LMR without having to pay to install their own equipment. Most of them died out due to stagnation of the technology and competition from cellular providers. There's a bit of excitement that that business sector could be coming back, as cellular equipment gets less expensive and increased data-centric usage has made quality of service on the mainstream cellular networks much more variable.

Almost all major cities operate a private LTE network for city agency use, for example. But for various reasons it's mostly been out of the reach of private ventures. This could be one piece of changing that (5G brings a number of the other pieces).