Companies which innovate within their existing competencies are doomed to fail; innovation means building new competencies.
We believe consumer behaviour will change more in the next three years than in the last ten. Think about it this way: this year, the eBay iPhone app will do $500 million dollars in volume on a device that didn't exist two years ago, on an application that didn't exist one year ago.
CEO, eBay 2009
Clayton M. Christensen
Professor of Business Administration, Harvard Business School