good question
I would think it would be used to show friendlies and groups/ squadrons, advances, engagements and yes, wall hacks of positions that are engaged.
It would all back fire once the enemies put it on, but Im sure theyll work that out.
I can think of tons of applications.. As a HUD for your equipment/environment (Ammo levels, oxygen, temp, humidity, wind speed), Communications and enhanced navigations based on AWACs, Drone footage, radar etc....
Even the AUTO-AIM scenario is not that far fetched to an extent.. System takes in all of the data points crunches the numbers and eventually displays your angle and trajectory to fire your weapon.
A new computer-aiming system for rifles lets you "tag" a target with a laser pulse and works out the best moment to pull the trigger, making life easier for long-range killers
www.newscientist.com
That article is almost 10 years old too.