Well I interperet this guys article something like this: "Wii owners are old and leaving the gaming market soon, no sustainability there. Nintendo makes really good games, but we don't feel like it because that means we will compete directly with Nintendo. The Wii is technilogocally inferior (although all the mainstream gaming consoles have been weaker compared to there competition) and will require a more powerful console to compete with the more expensive consoles because they will come back from the current market trend."
I feel that this guy is part of a growing minority in the game development world. This belief that all the good games can't be played on the Wii is stupid, and eventually the people that make the decisions (investors and publishers) will start telling them to design games for a system with the largest install base.