I'm lucky in that I live in London and can go to any of the big supermarkets (except Waitrose) within a 10 minute drive.
If Morrisons do go ahead with this plan, I will definitely go there more often than I do now (rarely) for a big shop.
I am so exasperated with Sainsburys who expect you to check-out a big shop on a self service till. My local very large store rarely has more than 2 staffed checkouts in operation, when it used to be a 20+ checkout store.
I'll switch my allegiance to Morrisons without a backward glance if they do it!