The machine -- whose name doesn't refer to four actual dimensions, but is instead a reference to the system's employment of a user's sense of sight, sound and touch -- is intended to bring what is called "situational awareness" technology to the next level, for use in the cockpits of fixed and rotary wing aircraft.
The point is to bring a fuller sensory experience into the cockpit. If you've ever glanced into a modern cockpit, you'll know how daunting all the buttons can be; systems such as these intend to augment a sprawling visual experience with sound and touch, to better leverage a human's natural combined sensory system.
It's a delicate process: do it right, and you reduce the amount of visual scanning necessary to get a new pilot up to speed; do it wrong and you'll easily achieve sensory overload -- not a good idea when that person is controlling an 18,000-lb. piece of metal hurtling through the atmosphere at 1,500 miles per hour.