"If you think about trying to go through a facility with all these different (items) and figure out if your prices are accurate, it can be very time-consuming," John Crecelius, Walmart's vice president of central operations, told the Arkansas Democrat-Gazette. "From our perspective, when you're doing things like this you're trying to improve your service to your customers and trying to make things simpler and easier for your associates at the same time."

However, the robots will not replace workers.

"Within that, we're good at doing a part of it, and we're terrible at doing a part of it. When it comes to picking the product up, the robot has no arms," said Martin Hitch, chief business officer at Bossa Nova Robotics, the company producing the robots for Walmart. "That's a really difficult science, and it's a slow, slow science. We know that the store associates will always be better at that."