What's your size?
When all this is over, I think many retail outlets will have failed; they have no income but are still expected to pay rent. And by the way, why is that? Since the government commanded them to shut, could not the government have also mandated that they have a rent holiday?
I think that shopping habits will change permanently. The social distancing will persist for at least a year even if the lock down ends. There are three hour queues at supermarkets, which argues that many more people would be willing to pay for a delivery service. I know I'd rather pay £5 than queue for three hours. Of course, it takes time to ramp this up; you need more refrigerated delivery vehicles, more employees (it should be easy to hire people right now).
Some things can be bought online very easily. Books are a good example of this; when you know which book you want to buy, you don't need to actually see the book.
Other things are more difficult.
I recently bought a few dozen underpants online. I know my size, I know what colour I want, the only variables were, what style, how many.
But I was talking to Ladysolly about this. It's different for women. There is no standard for the sizes of women's clothing. Each outlet has its own sizing system. Size 12 doesn't mean the same thing from place to place.
If I buy a pair of trousers with a 40 inch waist, then that's what I get (and I know it'll be far too tight). If I buy a pair of shoes size 11, then I KNOW they will fit.
If clothing sales are to move towards online, then this has to be fixed. Someone has to invent a sizing system that everyone can agree to use. I'd suggest the metric system. Just cite the relevant measurements in centimeters.