HappySqurriel on 11 July 2009
The SNES, N64, Gamecube and Gameboy Advance are consoles which can said to be related because they were essentially Nintendo following conventional wisdom in what people said gamers wanted. The NES, Gameboy, Nintendo DS and Wii are consoles which can said to be related because Nintendo decided to break with convention and produce something drastically different than people expected.
Edit: While you could claim that the similar processing power would make the Nintendo DS the spiritual successor to the N64 I personally think that it is much more the spritual successor to the NES; and I believe it has done as well for building the company and the market as the NES did back in the day.
