Self Check-out is a relatively new concept spearheaded by companies like Amazon GO. Despite the delays the company has faced, there is no denying that this is the future of retail.
The concept is simple, you walk into a store with your mobile phone that has an app installed and running, as you pick up items from the store shelves, they automatically get added to the app, you can then simply walk out carrying your items and you will automatically be charged using your preferred mode of payment. There are no checkout lines, no cashier, and no clumsy change to deal with.
This technology has already been adopted widely to some extent by services such as Airlines, Movie Theaters and Hotels who are using the resulting speed and convenience to streamline and improve the customer experience.
-Triman S Bhullar