I think you are just trolling, I can tell because your subject line is becoming more and more whiny, but if you are indeed interested in this topic get the latest summer issue of the Army Technology Magazine.
This is truly fascinating. The army tried for years to build those exoskeletal kits but field testing always came back with the same issue of soldiers removing their headgear under stress. So they switched to a new model that focus on augmented reality instead of VR. It's a simple helmet with a flip-top device that they can easily get out of the way as needed. Still full face but it's a transparent window and it works better for regular soldiers.
Some air force pilot have been using VR goggles for a while (like in those high-tech stealth choppers) but pilots are a different breed of people.
This is why I think the windowless plane cannot work. The visual contact with outside world is crucial when most people get nervous. Even if it's just the idea of being able to look outside, it's needed.