Walmart taks a page from Amazon to make checkout lanes obsolete

Walmart is rolling out a new technology in its stores that enables shoppers to scan and pay for their items without checkout lanes, registers, or cashiers.
Here's how it works: shoppers download Walmart's "Scan & Go" app, then scan the barcodes of the items they wish to purchase.
Once they are finished shopping, they click a button to pay for their goods and show their digital receipt to a store greeter on their way out the door.
Amazon revealed plans in December to introduce a similar technology to its own brick-and-mortar grocery concept, called Amazon Go, which is still in the planning phases.
But Walmart is leaping ahead of Amazon and already rolling it out to more than a dozen stores in Texas, Florida, South Dakota, Arkansas, Georgia, and Kentucky.