And the technology for the air burst munitions form OICW is fielded today.
For the primary gun itself there was basically no real way to put in a range finder and a good ballistics computer using late 80’s to early 90’s tech. Then the mid 2000’s came out and smart scopes started to become a thing which now even the likes of HK and SIG offer.
OICW also kinda made the same mistake as the G36 and that was integrating the scope and targeting system with the rifle rather than offering a truly modular platform that can be upgraded.
The G36 had a good optic for the mid to late 90’s but by the mid 2000’s it became very much obsolete, replacing it in the field in case of damage was also found to be near impossible so HK quickly switched to making pic rail G36’s especially for export as their clients weren’t going to pay a huge premium on a 90’s optic that is inferior to a bargain bin red dot and a magnifier setup or an LPVO.
Reading the pdf it actually came quite close to reality, many of its predictions came true in one shape or another. Even direct energy weapons are out of the lab these days and are fielded in limited capacities, in the next 5-10 years even airborne direct energy pods like the one being developed by Lockheed Martin will be fielded.