Well, not by free and fair election, but unless the perfect surveillance state also solves the problem of mortality, there will probably be a successor.

Possibly at a time facilitated by the security apparatus that puts the teeth in the surveillance state, because even if they theoretically have the capability autocrats rarely are interested in running their surveillance and security systems themselves, and want to spend time doing other things—which puts a lot of power in the hands to which those tedious bits are delegated.