Yeah, once TDD is implemented, things will get interesting for sure - also the CBRS band will open up opportunities for much lower cost radio devices that can have some "serious" range (i.e. small neighbourhood scale WiFi AP) - maybe we'll see that new generation get into ham, and also learning more about networking and launch their own metro-net ISPs?

One minor thing - hams would need to be careful they can run LTE/5G "out the box", given most setups use an encrypted layer to the base station. You can turn that down to zero confidentiality (EEA0) but still using integrity checking (EIA>0), but I am not sure if that's a particularly well-supported mode of operation.