When a new development in an industry changes everything drastically, call it a revolution. The Internet has certainly caused a revolution in the way people lead their lives.
Stemming from the Latin revolvere "to turn, roll back," revolution originally referred to the circuit of the stars through the sky. Today, it still means circuit when talking about the RPM, or revolutions per minute, in an engine. A revolution is also a drastic change in a field such as the fashion industry or technology, or similarly, a sudden, often violent uprising from the people to change the political system.