About 6 years ago many non-canned ambient groceries such as cakes and biscuits switched to "SRP", Shelf Ready Packaging. I was convinced at this point they were trying to standardise boxes in readiness of a future deployment of robot staff. A few months later I was shooting a promo film for an exhibition for automated sales systems, and all the big supermarket retailers were there taking a serious interest. I am convinced that by the year 2025 we will have supermarkets with zero staff except men walking around with cans of oil doing running repairs on the robots.
I wrote a few anonymous blog entries on a site about this a few years ago, and I think a few of things I claimed are already happening.
Regarding the robot vacuum cleaners, they seem to be of very limited use to me. At present they can only vacuum the floor, and that is really the easy part. If you are going to clean properly, you need to do the walls, the top corners, the door frames, the doors, tops of cupboards, furniture including the tops and backs etc. That is the time consuming part.