Scientists are re-evaluating the kilogram

One is to use a watt balance, in which a magnetic force levitates an object. This seems like it would be effected by where on earth the object was levitated. For instance, gravity is less at the poles than at the equator. I suppose they could correct for this by slightly altering the current to compensate for differences. The other involves counting the number of atoms in a silicon crystal using X-ray imaging. I have no idea what they mean, unless they're saying that 1Kg=Some # of Silicon Atoms. If these are our two choices, I say leave it as it is for now.