@Kwaad: Nintendo expect to sell 23 million DS units between March 06 and March 07, so ramping up Wii production won't be a problem. Also, 75 million units in Japan would be 2 per household? Are you sure? The potential is more like 25 million. And as usual, I'd say Nintendo don't have to win anything. Just outsell the N64 (say 40+ million units worldwide) and we're in for another 5 years of unique and fun gaming.
Hardcore gaming is a bubble economy blown up by Microsoft's $7 $6 billion losses.