As game developers and publishers look more and more to digital distribution as a way to bypass current brick-and-mortar game sellers -- in part to cut down on game reselling, a major loss to their bottom line -- we could be witnessing the beginning of a new model of game development. In the future, when you drop $60-$70 on a new game, you might just be buying the game engine and the background art, with the knowledge that the developers will be releasing content packs that provide entirely new, self-contained game experiences that build off the original title.