People will be more mindful of germs going forward. For example, hand washing habits will improve and social distancing (to some extent) will continue forward. Not in the sense that people will completely self isolate, but more so that people will be mindful of maintaining space among themselves. Mask wearing might become a bit more prevalent but I have my doubts they will be worn by the majority of the population.
I think there were some existing trends in the restaurant and live event space that will be accelerated by COVID-19. For the restaurant industry takeout / delivery models have already been on the rise for the last 5 years with UberEats / Grubhub / etc... This will only cause that model to continue to gain market share. I'm guessing we lose a solid 25%+ of existing sit-down restaurants. For the live event space (sporting events, concerts, etc...) we will continue to see a decline in attendance. Initially (post Virus, if there is such a thing) it will be pretty steep. It should improve a bit as time goes on but will never be like it used to. Television started that decline, COVID-19 will only add to it.
It was already pointed out that the workplace will change (for the better). Working from home wasn't a thing at my company until 2 weeks ago. That is probably a common story and I think people will like working from home. It saves on commute time / transportation costs and makes for a more flexible schedule. Of course having a shared workplace to visit for collaboration is a good thing but those things can be scheduled. There isn't justification to force people to physically be in the office for 40+ hours a week if not necessary, plus we have all been in too many pointless meetings that could have been done online.
I think there will be political ramifications as well. The New Deal came about during the Great Depression. Shock events like a global pandemic tend to lead to additional government involvement. Sometimes for the good, sometimes for the ill. This one is harder to predict because we don't know how bad the looming recession will be.