What technological advancement did movies begin to include after the commercial success of sound films?

The inclusion of sound synchronization techniques in movies represented a crucial technological advancement following the commercial success of sound films. When films transitioned from silent to sound, filmmakers realized the importance of not only incorporating dialogue but also ensuring that sound effects and music were properly aligned with the visual elements on screen. This synchronization allowed for a more immersive and realistic viewing experience, as audiences were treated to a seamless blend of audio and visuals.

Although sound synchronization was pivotal, it also paved the way for subsequent advancements in filmmaking, such as the development of color film technology. However, this came later and was not the immediate next step following the introduction of sound. Advanced camera systems and digital editing tools also emerged as important aspects of filmmaking, but they were not directly linked to the initial shift towards incorporating synchronized sound in films. Thus, the focus on sound synchronization techniques highlights the industry's response to the innovations that transformed cinema through the effective integration of audio.