It seems to me that the original post is somewhat confused. It's not that the Wii winning is itself a bad thing for developer, it's that the Wii winning signifies bad things for developers.
All else being equal, developers would love the Wii to win. If you replaced every 360 owner's system with a Wii and released Halo 3 to them, the game would still sell just as many copies.
What might worry developers are the changing attitudes of the market. Japan is clearly moving towards nontraditional games, and there's clearly a sizable worldwide market for them. Some developers might think that the popularity of the Wii means that the market has moved away from their types of games.
This distinction is very important. If developers didn't want the Wii to win, they'd want to release games on other systems. If developers simply didn't like the market realities signified by the Wii, then there's nothing they can do and they might as well just release games on the Wii.







