Proper VR is an important aspect of the device. The main focus is on the "spatial" AR-style experience, but there's also a lot of focus placed on being able to

Proper VR is an important aspect of the device. The main focus is on the "spatial" AR-style experience, but there's also a lot of focus placed on being able to be in a completely virtual environment in both the marketing materials and the OS. I don't think something which "works pretty well but doesn't quite become completely opaque" sounds good enough, especially for something whose only real advantage is possibly slightly improving how the wearer looks to others. For a different product that's glasses instead of a VR headset, sure, it might work (although I don't see why you'd want to go semi-opaque at all with glasses really, it won't be close to an immersive VR-style experience anyway?)