"Vision2 engine" is an application which acts like the brain.  It uses a pair of stereo images to lock on a selected focal point and assembles a "perceived image".  A 2D image which looks 3D!
There is no need for headgears, or special screens, to create stereo effect.  Using "Perceived Images", other features of "3d" can readily be added when needed.   "Virtual Reality" can now be mainstreamed.   For example, in the following image, by rotating the screen, the "horizontal parallax" of the view can be explored in full 3d, as if the image was a real object.
The all-important "focal point" of a view can be selected at image production time (as in the above examples).  Such images are, not only, a natural enhancement to "2d", but they also have the property that the pre-slected focal points, automatically, grab viewer's attention.  Ideal for advertising, websites, broadcasting or product display.
Where the viewer is in charge of cameras, such as in selfie, magnifier or endoscopy, the choice of focal point is of no issue, as it is, presumably, the point that the cameras are aimed at.
However, irrespective of camera position, the viewer may simply change his attention (gaze point).  As in the sample below, he would see the same view but perceive a slightly different image.
Using a gaze detector, "Vision2 engine" could match the focus to that of the viewer.  
Indeed, a personal viewing device such as a mobile phone, with appropriate cameras, equipped with
gaze detector and Vision2 engine, is ideal to produce and view images which look like solid holograms.
However, in most applications such as "Aim Game" below, one can use whatever the device capabilities such as
orientation/movement sensors, "mouse" or screen touch... to simulate the same results.
The concept of "perceived images" is in its infancy. If you believe that you have a killer application or one that benefits from depth perception, we shall be pleased to hear from you.