> e.g. Liquid Crystal displays Liquid crystal displays were commercially viable 10 years before they became commercially available. Source: my dad worked for

> e.g. Liquid Crystal displays Liquid crystal displays were commercially viable 10 years before they became commercially available. Source: my dad worked for a company that made display tubes for CRT manufacturers all over the world. He told me back in the seventies that they knew how to make TVs you could hang on the wall like a picture, but weren't making them because they were camping on a lucrative market.