Needless to say the meaning of "true" resolution. The FZ cameras have a good optics (from the reviews) with an acceptable amount of aberrations in trade for their ambition.
If you compare a DSLR kit lense with a more expensive one, then you understand the meaning of "resolution". A 6 megapixel DSLR with a good lens clearly outperforms a 10 megapixel one with the kit lens. You see more detail indeed. Kit lenses may improve when stopped down, but some seem to need to be stopped down even beyond the recomended limits (the difraction limit).
Most consumer cameras with 8-10 megapixel have in fact less resolution than good 5-6 megapixel cameras (the fujifilm F10/30 is a clear example, probably the highest-resolution compact camera with only 6 megapixels -despite its strong purple fringing-). People is paying for the pixels... the same pixels that destroy the pictures (with noise and their artifacts) to get simply less "true" pixels.
Very annoying, indeed...