Amazon's ambitious retail store delayed over technical diffculties

Amazon has delayed the opening of its cashier-less retail stores thanks to technical problems.
Due to open to the public at the end of this month, after a trial version was launched in the US in December 2016, the futuristic Amazon Go store uses cameras, sensors and algorithms to track products taken from the shelves. Sticking with the innovative theme, there are no cashiers and customers simply leave the store with their purchases without opening their wallets, as items are charged directl