The technology of the moment is a software application called the "Sekai Camera, " developed for the iPhone by a tiny Japanese company called Tonchidot.
The parties at war: the make-believe nations of Star and Uran in Karubeki Sekai ("The World That Is Coming"), a futuristic epic by the late Japanese cartoonist Tezuka Osamu.
The demo wowed the crowd: The idea is to link tags created by Sekai Camera users and others to items in the real world, using the global positioning system (GPS) location abilities of the iPhone.
