We know, it's easy to get caught in all the magic that is Mario Kart Wii -- "it's like Smash Bros. but with karts and more banana throwing!" -- but let's not fool ourselves here: that Wii Wheel is potentially the least functional piece of plastic Nintendo has shipped since the Virtual Boy.
It apparently took the fine folks at MTV two whole videos to figure this out under the patient tutelage of a Nintendo rep, but while the Wii Wheel can potentially serve as a helpful reminder to hold the Wiimote with the buttons facing you, it adds zero functionality to the equation, and it's only therefore "necessary" for the first 30 seconds of play -- after which it can be tossed to your dog or teething child as a chew toy.
Some might appreciate the ratio of turning a full wheel instead of a Wiimote, but we all know the truly hardcore are going to be kicking your ass with their Wavebirds anyways, to the point really is moot. Video is after the break.