Most accurate summary of the Kaku's arguement is Virtual reality began as a Pentagon generated tool that prepared jet pilots for nuclear war.
Explanation:
To minimise the occupational hazard and to get pilot accustomed by the hostile flying conditions, the Pentagon initiated the use of flight simulators to train pilots in facing dangerous flying terrains. These conditions involved the threat of hostile environments, enemies and huge winds caused by nuclear fireballs.
The whole technique involved pilots held up in their chair with goggles and joysticks, controlling the simulated computer image. This practice gave birth to the technique of virtual reality.
