Nvidia had a prototype a while back http://lightfield-forum.com/light-field-camera-prototypes/nvidia-near-eye-light-field-display/ http://lightfield-forum.com/l

Nvidia had a prototype a while back http://lightfield-forum.com/light-field-camera-prototypes/nvidia-near-eye-light-field-display/ http://lightfield-forum.com/light-field-camera-prototypes/nv... That hardware adds variable focal length to each pixel. But, even without that, simply being able to move your head around inside the captured scene with the current tech is 90% of the effect.