I can only speak for myself.
I feel under current global financial conditions that releasing consoles is not the best of ideas for families hard up for cash. I also feel that the consoles haven't been out long enough. I still feel there is life in all three consoles yet for at least 3 more years.
After what's happened so far Microsoft, Sony and Nintendo can all improve on what they've done. None of the current gen consoles are perfect. They all have thier pros and cons...
I can't really speak for the Wii as I've never bought one but have used one and I do echo the comments about how it must be more powerful.
I have owned an Xbox360 and I loved it - I did not enjoy the lack of BluRay and the loud fan, but I enjoyed and the games I played on it till I got the red ring of death. I enjoyed parts of Halo 3 but felt there was no mental challenge to it.
I now own a PS3 and I enjoy the lack of noise and the blu ray functionality. It's pretty much identical to that of the Xbox 360 in terms of games.
Obvioulsy, both have their exclusives and 'essence' . As I said PS3 has BluRay, but that's kind of counteracted by Xbox's superior Xbox Live system which is very popular and successful.
However, those issues aside I do want to see something from Nintendo, Microsoft, Sony and game developers. I want to see original games. No more GTA, Halo, no more GOW, no more Tomb Raider - lets get something new out there and original.
I'm not going to say which I will buy just yet as that's just retarded. Lets see what the big 3 come out with in terms of functionality first.