Time will tell if that's actually enough by itself to get the reproduction number less than 1. If everyone who wants a vaccination has one and yet we still have tens of thousands of new cases per day and hundreds of deaths and no downward trend, then I think continuing with masks and social distancing is going to be necessary.

I'm hoping that as the vaccination numbers go up, we'll eventually start seeing new cases drop off a cliff as the virus runs out of people to infect. (Though I suspect that we'll have problems for awhile with groups of people who hang out together and for whatever reason don't get vaccinated.)