Its possibly problematic for the Wii, but Nintendo's bottom line won't be in any danger for the forseeable future. Even as interest in Wii and DS diminishes, the 3DS is going to pick up all the slack (and then some). Not to mention that the Wii has such a huge lead in terms of installed units that the Wii 2 will probably be released before they manage to catch up. Of course, this is ignoring the fact that the Wii is still selling strongly despite the competition's motion ripoffs, and in a worse case scenario there is still plenty of room for price cuts.