And I own all three consoles, that's not a bad showing by the wii. And I don't think 720p would have changed anything for me.
I don't think anybody would argue that Quake 2 is more enjoyable at 800x600 than 640x480 even though you play "the exact same game". The same principals apply to console titles. When I see videos on youtube of people playing Wii games at HD resolutions on emulators I sigh. Increased resolution for rendering polygons does improve my experience.