The problem with 'future weapons' in games is that gamers want to play with Big Fancy Things: Giant Death Robots, Flying Battleships, Death Stars, the German Maus Super-Colossal Heavy Tank.
Unfortunately, Bigger is not better, it's just a bigger target. Development of bigger and badder tanks, with auto-loading 140mm cannon and a massive suite of electronic, missile, laser and other systems has been researched, but nobody has built any of them or made any plans to produce any: there are simply too many things out there, from top-attack 120mm mortars to drones to heavy long-range fire-and-forget missiles carried by a host of platforms that can attack big, fancy tanks - or ships, or aircraft, for that matter. A single manned strike aircraft these days is accompanied by a swarm of other aircraft flying top cover, ECM, recon, and AWACS support for it.
The trend in the cutting edge military technology today is towards smaller, stealthy, more capable forces - 'ordinary' infantry with UAVs of its own, satellite and stealth systems, augmented exo-skeletons, enhanced vision, etc. Vehicles are smaller and faster -multi-wheeled and weighing a fraction of what a main battle tank weighs, but mounting heavy missiles, hard to detect and easy to deploy both tactically and strategically. The US Navy is struggling to keep its massive aircraft carriers justified when a 600 ton Stealth Corvette or a single hypersonic land--or ship-based missile can take out a 90,000 ton carrier, and the missile has a longer range than the aircraft on the carrier!
Trouble is, a graphic of a stealthy infantryman operating with satellites, drones, micro-UAVs at night isn't much of a graphic: almost by definition and design, he's invisible. That means we are probably going to keep being presented with Giant Death Targets for Future Era units . . .