Not a new 3D reconstruction method, but something that simplifies setting up games tremendously and enhances the overall experience.
To not make an ultra large secret out of it: it’s a hugely expanded and refined “Direct Head Tracking” (name will change since it does more now), which previously was only available a bit hidden for Fallout 4 to test the basics. For games that fully support this, it gives perfect 1:1 rotational head tracking, perfectly calculated FOV and in some cases also positional tracking (which means finally positional tracking for Z3D modes!) simply by pressing a button and then waiting a few seconds. Expect about 30 games with this in the next update.
Simply put: no more configuration hassles + better head tracking for games that support this feature.