One hundred years ago, the invention of electrical light was what people associated progress with then. In the 1940s and 50s they associated progress with the introduction of Television and the Cinema. In the 1960s color filming and color Television was the biggest breakthrough. Today most people will associate progress with technology because it is the latest breakthrough that has happened in the last 30 years.
Now... I do want to clarify that the 60s were known for color filming and television but the earliest color motion picture lasted 50 seconds and it was recorded sometime around 1908.
The development of color filming was delayed greatly by the cost of filming, World War II and other world happenings.
For more information about how color filming unraveled please check this website: