From the Foveon description of the X3 chip, it appears to be much better than a typical 3.43 meg chip. Instead of dealing with all 3 colors on the same plane and having to interpolate between, the X3 directly records all 3 colors onto their own 3.43 meg layer. The way I think about it, is if you look at the way any one color is handled on a typical CCD, such as the D100's, then the resolution is pretty low. Interpolation algorithms are used to fill-in the missing pixels for that color. These algorithms, no matter how clever, will never approach direct measurement. If it isn't already, the X3 CMOS has the potential to be a superior technology to standard CCDs.