The basic problem with the Aerial Hunter-Killer is that it would gobble up enormous amounts of fuel while in “hover mode,”
Laser weapons capable of killing humans with a single shot are already being tested, and will be in service with the U.S. military by 2029, but plasma weapons won’t. In fact, plasma weapons might be inherently impractical to build at any point in the future.
...Therefore, while Schwarzenegger’s request for a “phased plasma rifle in the 40 watt range” made no sense, asking for a “PULSED LASER rifle in the 40 watt range” would have used correct terminology and have referred to a plausible type of weapon.
There’s no theoretical reason why the entire production chain of making a robot as complex as a T-800–from digging the raw metals out of the ground, refining them, forging and shaping them into body parts, assembling the parts, and transporting the finished product to its place of use–can’t be 100% automated someday. I conservatively predict that most manufactured goods will come from automated factories by 2100.