I think your way off, the graphics capabilities will be comparable.
Well I think you're way off
I certainly wasn't way off on which consoles were more techinically powerful this generation. I also wasn't way off on how well I thought each console would do in the different sales regions.
Here's my prediction, we'll wait ans see if it's true..
1. There won't be a gameboy 2, Not while the DS exsists and is already a leap above game boy in graphics and has backwards compatability. In other words, nintendo wouldn't introduce gameboy 2 until the DS has lived it's product lifetime. it is possible nintendo could just call the DS gameboy DS or something along those lines before it's released. IMO I wouldn't be surprised.
2. N5 and gamecube 2 are the same machine. Ity will be more powerful than gamecube but not nearly as powerful, or costly to produce as Xbox 2 & PS3. Nintendo isn't concerend with having the most powerful hardware and they are already starting to downplay the need for incredibly realistic graphics. This is why Nintendo has already stated it isn't a true sucessor to the gamecube and how they want to extend the life of the current gamecube.