http://www.cnn.com/2009/TECH/science/05/29/jetpack/index.html
“At the 1964 New York World’s Fair, people stood in line for hours to look at a strange sight.
“They wanted to see the ‘Futurama,’ a miniaturized replica of a typical 21st century American city that featured moving sidewalks, computer-guided cars zipping along congestion-free highways and resort hotels beneath the sea.
“Forty years later, we’re still waiting for those congestion-free highways — along with the jet pack, the paperless office and all those ‘Star Trek’-like gadgets that were supposed to make 21st-century life so easy.”