The point of eye tracking in VR isn't really about being an input control (even if that's what this company was focusing on). There are many big problems in VR

The point of eye tracking in VR isn't really about being an input control (even if that's what this company was focusing on). There are many big problems in VR that get solved if you know where the user is looking at. The most important one is, your eyes really only see high resolution in a very small region around what you're staring at, and if the VR headset can only really render that region in high quality, this solves many issues (processing power, framerate, even wireless transmission). Of course, for any of this to work you need perfect eye tracking, which is very hard.