The only issue with these is the factor of a gas attack. We are prohibited from wearing lens in the field in case we do come in contact with gas since it will do some hardcore damage to your eyes.
Otherwise I see no issue.
That was my first thought as well. I'm guessing we'd see new MOPP gear with the projectors built into the mask, or at least some kind of full cover helmet/goggle design.
What I'm interested in are the effects of long-term usage. I don't know if a full 120° FoV is part of the goal or not (I assume that would require personnel to have cameras on their person, but again, not sure) but even if they are used only to provide clear visual of everything near-and-far, it could be pretty jarring if someone grew accustomed to using them all the time suddenly lost that ability.