The world as depicted in sci-fi novels has arrived. Evanston, Ill.-based IO2 Technology (www.io2technology.com) has announced an innovative ad technology that can show videos in space. Read: without a screen. Heliodisplays, as they are called, went on the market in August. According to Cox News Service, viewing areas equivalent to a 15-inch monitor cost US$18,600. They can be navigated with hand gestures – no mouse required.