In training, IVAS can also provide data to improve performance, such as the wearer's gas and heart rate. Instructors could coach soldiers on their goal or room-clearing techniques, for example.
The existing HoloLens 2 is currently too big to work with existing helmets. However, one Army leader is expected to have a sunglasses-sized unit within six months. We would not count on that (it would probably involve moving many components to the outside of the helmet or the soldier's body), but development on IVAS has only been going on for a few months. "Thousands and thousands of soldiers could be using IVAS by 2022 and 2023, Under Secretary of the Army, Ryan McCarthy said, with a wider deployment by 2028.
The demo was clearly meant to sell people on the concept and allay the concerns of those who see this as a twisting peaceful technology into a destructive tool. Unsurprisingly, McCarthy does not perceive it that way ̵
However, this does not really change some of the core objections from Microsoft's staff and other critics. Part of their issue is simply that Microsoft committed to a military project without any input. The showcase may take some of the sinister edge off the technology, but it's not going to give the workers a say