The AR/VR headset that I want, but can't get yet has the following features:
VR display with dual outward-facing RGBIR cameras for AR applications
To allow for full VR as well as "see-by-wire" AR.
dual-using those cameras for Leap Motion-like hand-tracking
Using hands allows for complex interaction, virtual keyboards, all sorts of 2D and 3D GUIs. This would become the secondary UI in this setup. Can't be primary, because "gorilla arms".
high quality gaze-tracking (probably using inward-facing cameras)
Important for advanced rendering of 3D content in VR glasses.
Also the primary interface-element, replacing the mouse-pointer.
Notice: just looking at something to "select" it is more natural than using your hand to move an object (mouse or other controller) which moves a virtual object (pointer) ...
a few (2-7) dry EEG-electrodes in the upper lip of the headset
Most importantly this would be used for a "mouse-button", tracking the activity of the muscles below your eyebrows.
Notice: this can give you a faster "click" with less actual muscle usage than the usual use of a left finger on a left mouse-button.