Inside Amazon’s robot-run supermarket that needs just 3 human workers (nypost.com)

JeffBezos: .@nypost, whoever your anonymous sources are on this story http://nypost.com/2017/02/05/inside-amazons-robot-run-superm... – they’ve mixed up their meds! https://twitter.com/jeffbezos/status/829054770308485120

Yep. A new store type will enable them to achieve "profit margins of between 22 percent to 40 percent ", when the gross margins of Walmart are ~24%.