If you ever need to point students to some real-life examples of technological innovation in action, use this new list produced by the Guardian. Some great case studies here of how technology can be used to identify new value-added services for consumers & businesses, as well as challenge the existing business models of market leaders.
The underlying theme seems to be that technology is enabling these businesses to overcome barriers to entry in a market and quickly become quite disruptive to the established operators. Not all of these businesses will survive and thrive, but some (e.g. Spotify) are already household names and others may soon achieve that status.