OF THE ABOVE LIST, THESE ARE THE ONES WHICH I AM ACTUALLY RECOMMENDING TO ADD TO THE GAME BECAUSE IRL THEY WOULD BE INEXPENSIVE!
Of the list of what the Army says will be deployed, here are the ones that will actually happen due to costs:
-liquid armor vests(kevlar treated with shear-thickening-fluid)
These vests won't repair themselves but will do away with plates, giving more mobility with the same level of protection. Since it's fabric, more of the body can be protected though, such as the arms and legs. The liquid armor part itself is modified polyethelene glycol, an inexpensive chemical widely used today. http://en.wikipedia.org/wiki/Liquid_Armor
-Acoustic sniper detection systems
They've already started equipping foot soldiers with these today, so by 2035 it is 100% certain that pretty much all soldiers will have these.
http://www.gizmag.com/qinetiq-swats-sniper-detector/10486/
-The interactive HUD/Map thing in each helmet. If you look at ARMA 3's helmets, the OPFOR have screens in their helmets and bluefor has a screen in their tactical glasses, so this just needs to be made useful for the player.
-Thermalvision goggles replacing NVGs. Spec Ops units have access to thermal NVGs today, and prices are constantly dropping. By 2035 thermal NVGs should cost the same or less than normal NVGs do today. - http://www.gunsamerica.com/blog/night-vision-vs-thermal-vision-what-you-cant-see-can-hurt-you/
-XM25 (already going to be ingame) and smart scopes (at least scopes with built in rangefinders)