Looks like there is a lot of this going around.

https://www.newsmax.com/newsfront/walmart-automation-robots-stores/2019/04/09/id/910856/

The company plans to add 1,500 autonomous floor cleaners, the "Auto-C," and 300 shelf scanners called the "Auto-S." Walmart will also add 1,200 FAST Unloaders, which scan and sort items that come in on trucks automatically, and 900 pickup towers, which are able to retrieve orders made by online customers. Some of these machines could soon be seen moving through stores, checking inventory and cleaning the floor.