Clay Christensen is considered among the world’s most influential management gurus, on account of his article some two decades back ( 1995 ) in HBR in which he talked about a grave danger to established companies from disruptions. Since then disruptive innovation and disruptive technology have become very commonly used terms. His new HBR article tries to define a genuinely disruptive technology, which does not qualify Uber as a disrupter. Even then Uber does pose a threat to existing taxi business which has many inefficiencies. According to Chirstensen, a disrupter enters from the low end of the market. However, Apple’s innovations are all upper end. Netflix has disrupted Blockbuster. It took advantage of the pain point of the core customers. There are two types of disrruptive innovations other than what Christensen champions — insurgents who revolutionise old industries by using new technologies, and existing companies using their superior war chests and management skills to invade adjascent industries.