There are many theories as to why Thomas Edison was more popular that other inventors of his generation. There is an overwhelming abundance of conspiracy theories on the internet claiming that Edison cheated his contemporary inventor Nikola Tesla out of fame and fortune. Some of the wild stories would have you believe that Edison was the devil. As far as any conspiracy of why Edison is more popular than Tesla, it doesn't take a genius to figure it out.
Nikola Tesla was fascinated with AC power (alternating current), he is most famous for working with George Westinghouse in the development of AC power distribution. For much of his life Tesla worked alone in laboratories on experiments with alternating current. Edison was popular in the media of his day, and he introduced the world to devices that played music and movies.
Thomas Edison rock star
Thomas Edison was an entertainer who promoted cool toys that entertained the world. In a world long before the internet and television existed, Edison brought us music and movies. At a time when the world was changing rapidly as the industrial age was introducing new technology to everyday life Edison created the image of the mythical inventor. Edison wasn't working in some cold boring laboratory, he used his image as the great American folk hero to tell people he was creating an invention factory.
One of the first things created in his invention factory that would make Edison the rock star of the late 19th century would be the phonograph. The first invention of the phonograph was in 1877 while Edison was hoping to create a machine that would transcribe telegraphic messages through indentations on paper tape, which could later be sent over the telegraph repeatedly. Edison made a name for himself as the inventor of the phonograph giving demonstrations of his famous talking machine to the president and the US Congress. Becoming a legendary larger than life folk hero of the 19th century, Edison was dubbed the Wizard of Menlo Park.