1) Technology has greatly impacted the movie industry since its inception, from the invention of celluloid to advancements like 3D. 2) The Hollywood studio system rose to power in the 1920s through practices like block booking and vertical integration that dominated the industry. 3) Television posed a challenge to Hollywood in the 1950s, leading studios to adapt through new technologies and genres, though they remain a major force today through consolidation and blockbuster hits.