How Amazon's line-less grocery service might really work

The online giant has revealed its advanced concept for a store utilizing "Just Walk Out" technology. SAN FRANCISCO -- The Amazon Go grocery store, now in the testing stage in Seattle, sounds like a dream come true for holiday shoppers waiting in long lines. The underlying technology seems to be routed in terra firma, however, a mix of cameras, microphones and the massive servers that Amazon uses to run its cloud computing service and power digital assistant Alexa. The concept promises to let shoppers walk into a store, pick things up, and walk out, thereby skipping the checkout line while everything acquired gets automatically charged to a credit card. Amazon's explanation on how it works in its video is heavy on buzzwords: computer vision, deep learning algorithms and sensor fusion.