For some reason, I seem to see these numbers differently from everyone else here. I know people always say the 3 consoles are competing, but I don't generally find that to be true. It is true that all 3 share some of the same target audience, but those segments tend to be small "overlap" segments, not entire target audiences.
In my mind, the Wii came out with the idea that they would not compete with the XBox and the PS3 this generation. Instead, it looked at ways it could expand the market. It is doing a phenominal job at that. Most of the people I know who have a Wii did not own a console last generation. Of those who did, amost all of them own at least one of the other 2 consoles as well. Many people look just at the number and say "The Wii is crushing the PS3 so the PS3 is in trouble!". I just don't see that. The people who are buying the Wii now are generally newcomers to the console market.
That is a GOOD thing for botht he XBox and the PS3. Last I heard, more than 50% of the US plays video games of some sort. The console to household ratio is much less than that. If the Wii gets a console in every home I'm all for it. I have had several friends purchase the Wii as a "healthy" console, realize that consoles aren't as bad as they thought, and go out and get one of the other two when the Wii couldn't really deliver the gaming experience they wanted. Don't read that last statement incorrectly btw, it does not say that the Wii is a substandard gaming console. People just look for different things in games. The Wii really can't deliver the same kind of experience for a game like Resistance or Halo that the other consoles can.
On the XBox360s side, they were trying to get into the market and get profitable. They have done that. If you look at it, they threw all of their eggs into one basket - the XBox360. I am glad they are doing well. Competition drives the market. While it does have some negative side effects (platform dependant games and studios having to choose who they program for), all in all I think it is a positive effect. Microsoft needed the 360 to do well to stay in the console business - far more than Nintendo or Sony needed their respective consoles to do. Lets face it, the DS prints money right now, and Sony has a 3 pronged product approach that is doing very well for them (PS2, PSP, and PS3).
Sony looked at trying to cement a different type of video game system. They tried to put out a multimedia center. Right now people may think that this was a bad idea. I don't think so. If Blu ray wins the format war, then the PS3 positions itself very well as a multi-purpose device. The addition of the PSN and interoperability of Sony's devices (remote play for instance) allows the PS3 to become a central feature to a homes entertainment system. With online content becoming more and more important, Sony is the only company with a system that will do it all. The 360 can do online media and games very well, but it cannot really address offline media needs. That is far more than an HD DVD addon drive by the way, it includes other things like the memory card reader, USB operability, music playback and streaming, ect. Nintendo has a decent game system, but really has no other purpose.
Sony's strategy is not short term in any sense of the word. They are trying to position the PS3 and PSP such that they are in place and ready when the market is ready for them. They are trying to continue their success with the PS2 for as long as possible to help offset their losses with the other two. I think they have done that.
So look at where all 3 companies want to be this season:
Microsoft - needed to firmly establish themselves in the console market. This meant being ahead of the PS3. Anything less would result in publishers losing interest like they did last generation.
Nintendo - needed to establish the wider market. Anyone want to argue that they have succeeded?
Sony - needed to establish a solid install base and move towards profitability. They have done exactly that in my opinion.
So I think the holiday season was successful for all 3. I certainly wouldn't go as far as to claim any of them were in trouble or had done poorly when I look at their long term goals and where they are now.