We know what you mean, but the problem with what your saying is that it relies on faulty reasoning.
The reason I want better motion controls is because it will be better for games.
Exactly how do you plan on proving that statement to be true?
On top of that, have you even tried Playstation Move? It pretty much does exactly the same thing as Motion Plus. Is Move vastly superior to Motion Plus? No, not vastly superior. It depends on the game and for the most part, it doesn't matter. For all intents and purposes, they do the same thing with different technology. And the problem with greater accuracy is that most people suck at doing these things in real life (i.e. throwing a pass, shooting a gun). Developers will actually tone down accuracy or have the game assist the player so the game remains fun.
You're really wrapped up in Nintendo improving what they already have to make games better and I agree to a point. They should always be improving whatever they can. However, I don't think a more accurate Wii Remote Plus is the second coming of Jesus Christ. In fact, I find the screen on the tablet controller to be far more useful, particularly in sports sim games.