Small unit combat is being revolutionized by technology. Drones equipped with technology that can identify, accurately target and attack any living entity on a field of contention. It is far more important for grunts to have devices on their persons identifying them as friendlies than almost any other equipment. It will be hard to shelter or take cover on a battlefield against a technologically sophisticated opponent.
Ditto what you said. Hand sized drones with a single .45 round finds the bad guys and places a charge between their eyes.