In my mind, most consoles are defined by a single franchise. I can’t think about the Game Boy without being overwhelmed by nostalgia for the first Pokémon games, just as I primarily think of the original Xbox as a machine exclusively for playing Halo 1&2. That’s not a criticism–some series just come to represent my relationships with gaming hardware. So while the Wii will likely be remembered for its motion controls, I doubt you’ll ever catch me waxing nostalgic over anything requiring significant Wii Remote flailing.
As far as I’m concerned, the Wii was the Golden Era of Kirby.