Or at least I think this will be pure conjecture until/unless Microsoft announces something.
What happens on systems on which the Fall Update has been already applied and upon which a Reset recovery is performed? Does it go back to the pre-Fall-Update build of Windows 10 or is some mechanism in place that allows machines that have already been updated to access a different build if they Reset?
Perhaps someone here has already needed to do this and can give a definitive answer. Right now I really don't know exactly what I would recommend as far as doing a Reset recovery on a post-Fall-Update state machine.