Looks like the Marines are integrating Hololens into their Tactical Decision Kit (Editorial: Marines are currently training in the field with an SA Photonics (eMagin Inside) HMD called AITT, is Hololens then, simply a non-ruggedized version of AITT for Mission Rehearsal and De-briefing and other described tasks?)

AITT

"With less than 30% of time spent training in the field, TDK concentrates rapid decisions with immediate feedback in garrison. "

Interactive TDG (ITDG) The ITDG system allows the users to create and execute in-depth, customizable TDGs that show second and third order effects of decisions, as well as being capable of preparing AARs, debriefs, or digital Sand Table Exercises, among other uses.

Virtual Battlespace 3 (VBS 3) A first person shooter that places the Marine in up to squad- and platoon-level force-on-force scenarios where he is forced to think tactically, make decisions and communicate to his subordinates as well as his adjacent unit in a complex, competitive environment utilizing a range of supporting assets.

Augmented reality This system allows Marines to use live Indirect Fire (IDF) assets and real life Close Air Support (CAS) while maneuvering computer generated troops, enabling the user to physically see both real impacts on the deck with a maneuver element all in one picture. They are also capable of using a real life maneuver element with computer -generated CAS and IDF capabilities in order to create first

http://www.mcwl.marines.mil/Portals/34/Tactical%20Decision%20Kit%20-%20Overview.pdf?ver=2017-06-15-134634-927