Amazon is pushing sales of its Just Walk Out technology even as it pulls back on the checkout system in its own grocery stores, a move that comes as tech giants compete to own the Click-and-Mortar™ grocery experience.The company recently shifted away from the technology to smart carts in its grocery stores, but according to a blog post Wednesday (April 17) from Dilip Kumar, vice president at AWS Applications, the company maintains that the technology works for smaller stores and that it will be a viable sys ...