In training, IVAS can also provide data to improve performance, such as the user's eyesight and heart rate. Instructors can train soldiers on their goals or room-clearing techniques, for example.
The existing HoloLens 2 is currently too large to work with existing helmets. However, an army leader expected a sunglasses-sized unit within six months. We didn't want to trust it (it would probably involve moving many components to outside the helmet or soldier's body), but the development on IVAS has only been on for a few months. "Thousands and thousands of soldiers" could use IVAS by 2022 and 2023, said Secretary of Army Ryan McCarthy, with a wider distribution by 2028.
The demo was clearly meant to sell people on the concept and dismiss the concerns of those who see it which distorts peaceful technology into a destructive tool. It is not surprising that McCarthy does not perceive it that way ̵
However, this does not change any of the core objections of Microsoft employees and other critics. Part of the problem is simply that Microsoft has committed itself to a military project without any input. The showcase may take a bit of the evil edge of the technology, but it will not give workers a word.