> our general willingness to physically interact with each other
In the best outcome, there is a successful vaccine. Even Introverts Gone Wild. The Roaring Twenties all over again, as another commenter mentioned.
In the worst outcome, we learn to live with COVID-19 or its offshoots, forcing each person to take into a risk calculation and mitigation measures for meeting others, especially in crowds.
In all outcomes, humanity will survive. Even if the Contagion virus, which was modeled after the Nipah virus with 80%+ mortality rates in certain break outs, becomes a reality in the future, there will always be survivors.