The progress of UAV development is pretty astonishing. It seems that a new UAV goes operational every 6 months or so. This bad boy can carry up to 300 pound of payload and fly as high as 30,000 feet.
Robotic infantry units may be way off into the future but swarm of war-bot drones are becoming reality every new day.
A prototype, 400 knots, 4 hellfires.