I think in the near future many stores will start using the Amazon system. There is no checkout at their stores in Seattle. You just walk in and pick up whatever you want. There is no checkout. They can figure out what is in your cart when you are walking out the door.
Not to totally derail this thread but automation is an area I am very interested in and the cost to set up the Amazon style stores is really prohibited with the number of cameras required. Even Amazon has said these will most likely be used more at smaller grab and go places where near-by corporate workers, who will pay $15 for a sandwich and a piece of fruit, will keep margins high enough to support the infrastructure. (And to answe the fruit question they either prepackaged in marked weights or they do what a lot of stores are moving to and that’s price per item so $2 per pepper/potatoe/onion/banana and then count the number you grab.)
The direction grocers are really hoping things go is online ordering where employees pick the groceries from warehouse shelves and then you have a pick up service or pay for delivering with Instacart/Uber OR autonomous delivery vehicles. Since these vehicles won’t hold passengers the belief is they will be online in communities in a much faster timeline and because most people shop within 2 miles of their grocery store (urban/heavy suburban) the drive range will be pretty compact and limits the need for extensive coverage. This allows stores to forgo the expensive “customer experience” costs that are often higher than food costs (things like wide aisles, attractive branding, high level lighting, etc).