UK is probably the early test case for what could happen here. The overwhelming majority of people being hospitalized are unvaccinated and mostly young.

The shit is vicious for that part of the population.

Unfortunately many of the people I know haven't gotten the shot and they have been relatively safe so far. So this could blind side them.

There's really 2 Covid trends going on over here already. Heavily vaccinated areas are seeing infections drop. Under vaccinated areas are still seeing infections rise.
https://www.washingtonpost.com/health/2021/06/14/covid-cases-vaccination-rates/?itid=hp-top-table-main

The variant(s) could make that dichotomy worse.