Let's see, it only came out in 2006 so you're basically giving everyone the entire lifetime of the console:
Zelda TP
Super Mario Galaxy
Super Mario Galaxy 2
New Super Mario Bros
Metroid Prime 3: Corruption
Metroid Prime Trilogy compilation
Super Smash Bros Brawl
Metroid: Other M
GoldenEye 007
Definitive version of Resident Evil 4
Donkey Kong Country Returns
Sin and Punishment 2
Kirbys Epic Yarn
Tatsunoku vs Capcom
No More Heroes 1
No More Heroes 2: Desperate Struggle
Mad World
Sonic Colours
Red Steel 2
Geometry Wars Galaxies
Excite Truck
ExciteBots
Wario Land: Shake It
Zack and Wiki
Rabbids Go Home
Endless Ocean
Wario Ware: Smooth Moves
Murumasa: The Demon Blade
Bit.Trip games before other services
Mario Kart Wii
Monster Hunter Tri
That's just the stuff that came out only on Wii (or came out on Wii first). Its just as good as the Gamecube, better IMO, in terms of first party output -- what its missing is the best of the HD twins - the likes of the Batman Arkham series, Assassins Creed, the new Tomb Raider, the best version of CoD etc. Cafe will soon fix that, and the Wii has given us plenty.