It's excepted for South Korea, Japan and China take the lead in adoption and applications. US customers might not be not priority, because US consumers have have very low bandwidth caps, lets wait and see.
I think many people underestimate the ambition of 5G and assume that 5G is just 4G with more bandwidth.
Big advantage of 5G over 4G is that it can _also_ use unlicensed spectrum. This enables more use cases like enhanced mobile broadbands, device-to-device mesh networks, private 5G networks, etc.
5G is designed to use wifi when available. It's more than just new cellular radio interface and antennas (NR part). 5G connection can use 5G/LTE/WiFi simultaneously. Gibabit LTE can be used as an anchor for 5G functionality even when 5G network is not available.
In this sense 5G NR is not a priority. 5G NR first arrives in the most congested areas to increase the bandwidth. If you have only LTE, you may not get as much as those with 5G phones in some concerts and crowded events.
Among the first uses of 5G NG are base stations companies build for themselves. Like networks in factories and other locations using unlicensed 60 GHz band. It looks like Chinese are jumping into industrial use of 5G very rapidly. They are already ahead of the schedule. Consumer applications will follow.