The gadget I had the honor of trying out was the Drone, the drone is remote controlled from a safe distance and in the demo I tried could mark targets on your map so you could stalk your prey from the safety that the sky offers you.
Along with the open world aspect of SGW 3 which is new to the series, they have also introduced many other gadgets with amazing precision unmatched by other games. A completely revamped set of tools is being brought to SGW 3, from a completely open world concept that allow you to see it, get there and try and Snipe your targets.