I do think 'Mariko' is probably a die shrink, but there could be more changes. I've heard that the 4 'little' cores in the X1 are disabled because of a manufacturing or design issue. If true, could they be omitted entirely from Mariko, perhaps to reduce costs? Also, how likely is a bump in GPU frequency? At least when the Mariko Switch is docked, I see no reason to not increase the GPU frequency (assuming Mariko is in fact a die shrink). I've also read on here the fan could be disabled when the Mariko Switch is not docked (again, this suggests a die shrink). Would love to hear what everyone else thinks!