The New Yorker article
http://www.newyorker.com/reporting/2012/05/14/120514fa_fact_macfarquhar 

“How was it that big, rich companies, admired and emulated by everyone, could one year be at the peak of their power and, just a few years later, be struggling in the middle of the pack or just plain gone? The first industry that Christensen studied was disk drives. He saw that the companies that made fourteen-inch drives for mainframe computers had been driven out of business by companies that made eight-inch drives for mini computers, and then the companies that made the eight-inch drives were driven out of business by companies that made 5.25-inch drives for PCs. What was puzzling about this was that the eight-inch drives weren’t as good as the fourteen-inch drives and the 5.25-inch drives were inferior to the eight-inch drives. In industry after industry, Christensen discovered, the new technologies that had brought the big, established companies to their knees weren’t better or more advanced—they were actually worse. “

THIS can be directly seen in the music business TODAY.