10 inches longer wheelbase does make the MKS much larger than the LS, but its not suppose to be its replacement anyway. I'm pretty sure the MKS is intended to be the flagship after the Panther platform quietly disappears from dealer lots. While I don't think this car is a truely worthy successor to the Panther (notice I have yet to say towncar or continental. . . those names should remain on some lincoln, somewhere, someday) it is a very nice car; something we can all agree represents a step in the right direction for Lincoln, considering its a big car with unibody construction and a departure from "traditional" (whatever that means) Lincoln styling.
A more likely proper successor for the LS would be either a future form of MKZ (i'm thinking direct injection with compound boost) or, if we're lucky, something like the MKR we were promised at a car show a year or so ago.
Anyways. . . I think the MKS is simply drop-dead gorgeous. If only the interior had been just a little more riskay like that of the MKZ. . . . .