Cool idea, but I have a few conscerns.
1. Is it rugged enough? ie weatherproof, dust proof, shock proof, cracked screen proof
2. Does it detract form the mission at hand? ie block vision, impair concentration
3. Can the interface be operated in full gear? ie buttons look small, soldiers often wear gloves / chemical gear.
4. Is it tactical? display seems very bright. Is there a darker color scheme? I wouldn't want this thing giving away my position
5. Is it rugged enough? Believe me when I say, soldiers will damn near go out of their way to find out if they can break something.