Is it too little too late? For years big box retailers have been hemorrhaging money thanks to the Amazon (NASDAQ:AMZN) showrooming effect. The term “showrooming” has become so commonplace that it has even earned a definition on Urban Dictionary:   "The act of going to retail stores like Best Buy (NYSE:BBY) and Wal-Mart (NYSE:WMT) to check out certain products and then once satisfied with the look and feel purchasing the item online on Amazon or other retailers.   "Dude this video camera looks amazing but I really want to see how it feels in the hands. "Let's go showrooming ...