That seems hard to picture. They already fill our trucks, FedEx's trucks and mail vans. With all of their sales, it's hard to imagine how much larger their sales need to be to make big profits. Some of their ideas to turbocharge their business are far-fetched. Drone shipping? Please...a publicity stunt. Selling groceries? That's a niche move, at best.
I don't think Amazon is going away. But they're going to have to change, eventually.