What would Fisher do with naval fission plants and autoloading cruiser and battleship guns?
Short answerHe would pursue exceptionally large, heavily armed ships unconstrained by conventional fuel endurance.
NotesThe answer imagines Fisher pushing the Incomparable concept far beyond its historical scale. Nuclear propulsion removes the normal fuel constraint that otherwise governs range, bunker space, and operating endurance. Autoloading heavy guns likewise make still larger armament arrangements imaginable. The joke that Incomparable would look like a mere excursion yacht conveys the likely direction of Fisher's thinking: the new technologies would encourage an exceptionally large capital ship rather than a restrained design.