Yes, Clone Troopers eventually transitioned into Stormtroopers. After the events of Star Wars Episode III: Revenge of the Sith, the Clone Army was reorganized and gradually phased out, being replaced by recruits and conscripts who became the Imperial Stormtroopers serving the Galactic Empire. The clone troopers' genetic template, Jango Fett, was no longer used, and the Stormtroopers adopted a new standardized appearance and training regimen under the rule of Emperor Palpatine.