All the experts agree, this isn't something tjats "going away", much like the flu. We as a society will build up various levels of immunity, but probably require annual shots (unlikely to be a different version unlike the flu shot due to slower rates of mutation) but it will be something that's just in the background.
We're not going to turn into walking dead but there will be flare-ups, especially in unprotected or otherwise vulnerable populations or groups.
We missed our chance at containment, that ship sailed a while ago. Will we get a more virulent strain? Hard to see how it can much worse than delta, which isn't as bad as measles or chicken pox but it's up there. Will it become more deadly? Possible, SARS and MERS were way, way worse (MERS has a case fatality rate of something like 30%, maybe higher).
If we get a strain that spreads like delta but kills like MERS, the population decimation will make the bubonic plague in the 1600s look pedestrian.
Get your fucking shots and mask up. Damn.