I think the only thing standing in the way of the Wii and an easy win over the 360 and PS3 is 3rd party support, specifically the reluctance of 3rd parties to develop big/expensive games for Nintendo platforms because they have to compete with Nintendo games. The DS has shown that, at least with a crushing market-share advantage, 3rd parties can do swift business on Nintendo platforms. But it will take a lot of convincing on the homefront...