" Disruptive technologies bring to a market a very different value proposition than had been available previously. Generally, disruptive technologies underperform established products in mainstream markets. But they have other features that a few fringe (and generally new) customers value. Products based on disruptive technologies are typically cheaper, simpler, smaller, and, frequently, more convenient to use. There "

― Clayton M. Christensen , The Innovator's Dilemma: The Revolutionary Book that Will Change the Way You Do Business