Direct VR is an enhanced and heavily extended Direct Head Tracking that was introduced with the last bigger update as a test case in some games. It now provides automatic 1:1 head tracking, automatic and always perfectly calcuated FOV adjustment and in some cases also handles positional tracking (which allows pos tracking in Z3D mode) at the touch of a button.
Note that this does not work automagically for every game, it requires game specific profiles. 15-20 games will get this with the update.