I think for a year/18 months, the whole sector will be so badly hit that many businesses will simply go under - even some of the big names.

But when there is actually a proper working vaccine that makes it perfectly safe to socialise properly again, new names will start filling those gaps and the restaurant sector will rise again.
I suppose the same will be true for cinemas, theatres, museums, gyms, event businesses. And hairdressers, beauticians...
Of course, in the meantime, it will all have a knock-on effect on suppliers for all these struggling companies - wedding photographers, florists.
I've been working for a printing business recently - it's lost nearly all its customers, as they are all made up of the above businesses. 
Oh dear, I'm depressed now. Pass me the gin. 