The most we're going to get out of a vaccine is a tool that can be used in conjunction with physical distancing, and masks, to keep the infection rate and hospitalization rate sustainable.
Even with a vaccine, COVID-19 will remain one of the leading causes of death among the sick and elderly. The percentage of chronically ill people who live, and the percentage of people who make it past age 65, will plummet.
Everyone who's alive now will almost certainly need to socially distance (and should wear an N95/KN95 mask in public indoor spaces) for the rest of their lives.
What's happening now is humanity's normal.