I'm really disappointed that neither the bigger games: Oculus nor Valve's VR invested in eye tracking technology. Eyetracking is CRUCIAL for a full a completely immersive experience, as it can push, with adaptive rendering, the quality of the image to the next level. It is also ESSENTIAL for a full 3D experience as it can simulate depth of field. The biggest problem that stereoscopic films and technology has always suffered is from the lack of selective depth of field, many people, including me, don´t like 3D cinema and televisions and fell dizzy and weird because you can´t choose what we want to focus. Eyetracking can correctly identify what your eyes are trying to focus on and simulate how the light rays hit your retina avoinding brain confusion to fail to achieve focus.
When I discovered tha FOVE VR was investing in eyetracking, Oculus and Vive Vr instantly lost my money. I will support FOVE, (and you guys should too) because I really wish it attains significancy in the VR game and force the competition to implement eyetracking too on a second generation devices.