Eye tracking, probably not, but localizing the VR headset in space without needing an expensive rig in your living room is cool. Or perhaps even being able to b

Eye tracking, probably not, but localizing the VR headset in space without needing an expensive rig in your living room is cool. Or perhaps even being able to build a 3D reconstruction of your living room, localize yourself within it, send the reconstruction to your grandma and let her join you in your own living room.