What's new is that the vaccinated population is no longer "a protection" for the unvaccinated because they are now contributing to spread in much higher numbers.
Cape Cod: 882 infected, 653 (74%) were vaccinated. 7 out of 882 hospitalized (0.79%)
So, for the vaccinated, the vaccines are still VERY GOOD protection against severe illness, hospitalization, and death, but we can now spread COVID almost as effectively as an unvaccinated person. And Delta causes more severe illness in the unvaccinated than Alpha did.
See the numbers above.