Amazon wants to fix grocery shopping by eliminating checkout.[0]
The friction with grocery shopping for me is in a completely different area, and also easily solvable.
If I could go to a store that was basically a Kiva[1] fueled warehouse, enter an order on a tablet, and have it brought to my car (or order in the morning and do curbside pickup on my drive home from work), I would save the hassle of searching store shelves while playing demolition derby with a bunch of other carts.
Walmart has toyed with free curbside pickup.[2] It should actually make groceries cheaper though. If they had a warehouse logistics backend, without customers wandering around through their inventory, they could do amazing things.
With apologies to Clarence Saunders, yeah, basically I want to end self-service.[3] Customers were more efficient than the clerk for that job, so that model won. But robots are much more efficient than customers now, so I'm ready for the next revolution.
[0] http://www.businessinsider.com/amazon-go-grocery-store-futur...
[1] https://www.cnet.com/news/meet-amazons-busiest-employee-the-...
[2] http://www.businessinsider.com/walmart-is-expanding-free-cur...
[3] https://en.wikipedia.org/wiki/Clarence_Saunders_(grocer)