Flying cars, transparent cloaks, technology which can read minds and games played by brain waves - the stuff of fiction, surely? Not so, these seemingly far-fetched inventions - and more - are now reality. What lies beneath the cloak. For a vision of what the future holds, thousands of nay-sayers and believers alike have got an up close and personal glimpse at NextFest, an expo in San Francisco organised by the technology magazine, Wired. "This is a city that is always looking at what is next," says editor-in-chief Chris Anderson. "We have brought the most innovative minds and extraordinary technologies from around the world and here is what's next. These are the things that will change the way we live and work and play in the future."