Legendary "I'll be back" spoken for the very first time

Rating: 8/10 (19 May 2018)

Computers that control nuclear weapons become self-conscious and start a nuclear war to exterminate the human race. After the war, survivors, led by John Connor, are in the war against machines and they are winning. Machines send cyborg to the past to kill Connor's mother and prevent his birth. Humans send Kyle Reese to save her. The rest is history.
From today's perspective, this action SF is still good, but largely out-dated. Subjectively, I would rate it six out of ten. But when you take into account that it was filmed in 1984, that it had a serious impact on the genre and career of several actors, as well as anti-nuclear message and warning that technology develops faster than our ability to manage it safely, the rating must go up.
8/10
I would like to add another observation. If the film was exactly the same as it is, with the only difference that Terminator was not a robot but a ghost or a demon or something like that, it would probably be classified as a horror. This movie has all the elements of '80s horrors, and the only difference that distinguishes it from them is the quasi-scientific premise.