Well actually, the article never said that. What it suggested that if Toshiba helped Nintendo to solve it supply issues, more people would buy Wiis and not PS3s as their second choice thus decreasing the sales of Blu-ray players. I agree, however, Nintendo is irrelevant here.
I think the market segment who decides to buy a PS3 because they can't find a Wii is extremely small. Especially among those who already own 360s.