If you'd have told a 14th-century peasant that there'd be a huge merchant class in the future who would sit in huge metal cylinders eating meals and drinking wine while the cylinders hurtled through the air faster than a speeding arrow across oceans and continents to bring them to far-flung business opportunities, the peasant would have classified you as insane. And he'd have been wrong to the tune of a few gazillion frequent-flyer miles.

-- someone on Usenet replying to someone deriding Kurzweil