It won't return to how we lived last year. Too much has changed. We'll certainly go back towards how it used to be, but not all the way and not in every aspect. It's the classic pendulum swing.
So many people are working from home - many will continue at least for some of the time.
Shopping habits have changed. Huge numbers of people now get their groceries delivered or do click n collect. They won't all go back to trudging around Tesco themselves. Same with internet shopping - it's accelerated the trend and the slow lingering death of Identikit High Streets will be quicker.
We'll never go back to long waits in overcrowded GP surgeries or out patient clinics (thank goodness). That particular folly can be consigned to the history books. Who'd have thought that doctors could do things remotely by phone after all or that hospitals could make proper appts and run on time rather than giving everyone the same 9.30 appt and make you wait all morning!
More and more people have discovered a little bit of plastic called a debit card that is now widely used by even the smallest of shops, some of which don't accept dirty/smelly cash anymore. Even our tiny village bakery now has a card machine thanks to Covid.
In the fullness of time, we may also find that new bars, restaurants and nightclubs will use larger premises so people aren't squashed together like sardines. Likewise, rather than shortening trains, we may find train operating companies buy longer ones so that we don't have to spend an hour stood sniffing someone's armpit.
The "new" normal will be like what we had last year, but (hopefully) different for the better.