Originally, “disruption” was a term of art to describe how a firm can use new technology to introduce a low-end product at low prices, improve the product over time, and eventually overtake even the premium products offered by incumbent companies using older technology. This is roughly what happened when the advent of PCs disrupted the market for mainframe computers: at first PCs seemed irrelevant, then they became dominant. Today mobile devices may be doing the same thing to PCs.
