"NintendoLand" is the new Nintendo "Wii" brand. (say that 10 times fast)
The purpose of both is to show off the capabilities of the hardware to which NintendoLand did incredibly well - 3rd highest game on the platform after all. And there's a reason for it, the mini games are really fun especially in a party environment. Capitalize on these types of games, more game-pad usage. Do not abandon!
run away!