Helmet-mounted displays are priceless on the battlefield, but expensive. DARPA’s new helmet-mounted display system is designed for infantry soldiers, not fighter pilots. The display can flip up and down so that the soldier wearing it can enjoy an unobstructed view whenever he or she wants. The system is built within DARPAs TransApp ecosystem, the same ambitious software initiative that powers thousands of soldiers smartphones. It’s not much different than the navigation features on Google Glass.”]
Source: https://gizmodo.com/darpa-hacked-together-a-super-cheap-google-glass-like-d-1695961692