Great Reforms In Movies

Talkies
The landmark talkie was "The Jazz Singer," premiered October 6, 1927, but it is essentially a silent film (about 75%) which occasionally breaks into songs, plus one monologue and one dialogue segment. The first feature film to have dialogue all the way through (notice the qualifiers here) was "Lights of New York" (1928).

Colour
Development of Kinemacolor, where both filming and projection were done through red and green filters. The film went through the red filter and green filter successively, one filter after the other. Smith's A VISIT TO THE SEASIDE (1908), an eight-minute short, was the first commercial film. The public first saw the process in 1909, in London.