Case in point. I work in a deli. One of the cheeses we carry won an award at some cheese festival. They sent us a note. We read the note. When people ask for brie, I always mention "hey, this one won an award a few months ago."
That cheese outsells everything else, simply because those guys sent us a note telling us about their product.
Really, when you're marketing a game, you should do the same. Companies never do, but it does pay off. Hell, they should at least ship signage - a little cardstock thing that says "this is the new fourth edition D&D!" to put on the bookshelves. I know I see it at my FLGS.