I think it's interesting.
In previous bad years, the Boxing Day sales have been preceded by pre-Christmas price slashing.
I doubt it would get me into a shop, unless the discount was spectacular and it was something I particularly wanted. If the discount was spectacular, it could end up like Black Friday with massive queues and a scrum at the door. Even less reason to take up the offer!
It will be interesting to see how retailers of various types (eg Supermarkets, fashion stores, electronics) approach christmas. Given the current speculation around lockdown, at what point will the public decide about Christmas. Whether to buy all that food, because family may or may not be coming round for Christmas dinner. Do you book your regular Christmas meal for work/friends/activity group, pay the deposit then lose it? Will people buy fewer presents if they are not meeting up, or buy more (or bigger / more expensive) presents to compensate for the rubbish year and to compensate for not seeing family / friends as much? The retailers will already have had to second guess this and place their orders with suppliers.
I noticed, doing my online grocery order today, a tin of Christmas biscuits being suggested to me. Have the annually shrinking tins of Roses chocolates been placed at the supermarket entrance yet?