I'm with this idiot ^^^^^
Nintendo have always lagged behind in the areas that the competitors are still focusing on - principally graphics but also game libraries. You don't need to have the absolute best graphics and a library of 10,000 games to have a successful console. The Wii delivers what you want from a game console better than the others*, and it delivers enjoyment.
* Obviously the other consoles are close competitors on this note and I am massively generalizing, and we all know that generalizations are all false... I am fully aware that this is subjective to the game being played and your own personal preferences, but there is just something so cool about Wii Sports that sets the Wii out from the crowd.
It is also worth mentioning that developing games for new and top of the line hardware is
hard to do. I know this from professional experience. Making something awesome for tried and tested hardware is much easier to do than making something just as awesome for brand new hardware. Nintendo, I think, have once again found a perfect balance between cost, playability, developmental ease, fun and novelty. Remember the uproar over the N64 paddles? Three handles... egads! Now remember how cool Goldeneye was for it, even though there were games with better graphics?
That is the fine line that Nintendo are walking, and they are walking it by themselves.