Label this under super-unnecessary. Self checkouts can save a lot of time, especially when you're only picking up a few items. But do you really need a self checkout to bag the groceries too? This particular machine seems to auto-price and scan the groceries in the basket as well (similar to the Amazon store prototype in Seattle), which is definitely a bonus.
The experimental "Regirobo" is still in the works and like the Amazon store is limited to only one grocery store in Osaka right now.
Check out the video below!