Necessity is often the mother of invention with some inventions not catching on, due to lack of necessity and vision. The Romans invented steam power but there was no push to use this to start the industrial revolution. The computer above could have been one of those steam engine caliber inventions that did not sell because the traditional was good enough. Often there is no need, when the status quo is deemed good enough. You will sometimes see a prototype or two, with the experts of the day (final decision) saying this will not amount to anything. Old dogs can't learn future tricks unless backed into the corner by necessity.