I'm not worried. New equipment will be stamped out and installed into existing towers. Nothing new here as that's how it always happens. If the laws of physics become an impediment, so be it; the limitation will set expectation and thus the industry will adapt. Meaning, don't expect 8k or 16k video formats streaming over cellular service anytime soon.
The new hotness will be voice over WiFi anyways. Xfinity (Comcast) already has a large WiFi router install base already, each one broadcast the same public SSID. The idea is that you can roam between areas with Xfinity and route all traffic through their network and not my cellular provider. In fact, I do that already with my familiar places I often visit. No need for a 6GB monthly plan. And unless you're a road-warrior, there's no need for you to have one either.