It's certainly counter-intuitive. Amazon has become big and brawny through being mean and lean. While traditional bricks & mortar retailers remain encumbered with their physical store bases, the US online giant has soared through cyber space like an eagle. So why is Amazon Fresh going offline in Seattle and experimenting with a drive-in?Could the tech star be on the verge of clipping its prime competitive advantage? Or is the project just another laudable example of the way US companies fearlessly progress by trial & error?Meanwhile, retailers can only hope Amazon doesn't conclude that they charge far too much for their often grim customer service and depressing store ambience.As there is no point in asking the secretive and opaque behemoth for more information about its ultimate intentions, let's take a sneak peek at what exactly the company is building in its home town.