Self-checkout is being reassessed at retailers such as Walmart, Target, and Costco due to revenue losses and staffing issues. But it's not going away.

Unions wage war on self-checkout ... Fresh & easy employees teach shoppers to use self-service checkout stations as Tesco PLC, the UK’s biggest retailer, officially enters the U.S. market.

Walmart is scaling back on its self-checkout machines at two stores, as more retail giants reduce the self-service option as part of an effort to fight theft.