A disruptive innovation is a technologically simple innovation in the form of a product, service, or business model that takes root in a tier of the market that is unattractive to the established leaders in an industry.

There are a lot of companies - not just Sony and Kodak - that have spent a lot of money trying to make the quality of the digital images comparable with film. But when you're sending these things over the Internet, they don't have to be high quality.

An innovation will get traction only if it helps people get something that they're already doing in their lives done better.

Clayton M. Christensen Quotes