Harrison went on to say that the PS3's motion-sensitive controller had been in the works for some time. "We have already worked on it a long time, and Nintendo almost certainly has done likewise with something similar," he said. "It is perfectly naturally for two companies to work on [nearly] identical devices. It's like that with technology." He reiterated that the PS2's Dual Shock controller is the "de facto-industry standard for video games. ... We define the standard for the man-machine interface for playing games."