Amazon is worth more than the ten largest retailers combined. With the launch of Amazon Fresh they are laying a new stake in the ground which will surpass Amazon's Whole Foods chain in short order. Hold on to your hats because a serious grocery war is coming with big pushes from Aldi and Amazon! Don't be surprised if existing chains sales drop by 20% or more once these new players gain a foothold. The second richest guy and the 4th richest family in the world play hardball.