Could Walmart replace shopping carts with robots?

We already know about Walmart’s plan to use drones for delivering goods to the homes of its online shoppers in super-quick time, but what about the customers who still prefer to visit its physical stores? What can it do to improve their shopping experience? One solution may come in the form of Budgee, a basket-carrying robotic helper that’s designed to follow you around the store as you shop.
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