I don't think I personally care too much about the name changing, but I think Nintendo stands to benefit from rebranding. The Wii name doesn't carry much clout with their intended audience and the casual audience has basically left.
I'm not sure what they could call it, but hopefully they understand how to brand it properly to appeal to the core gamer. GameCube wasn't a bad name, but its poor branding and console design (shape, color) really hurt it.


