I was hesitating between a 4.5 and a 5, until last 5 minutes... this is called a classic sci-fi, not because how sophisticated the visual effect it has, but how humanity can be expressed in the form of robotics.
One star is reserved for too much irony to be true. However 40 years later what we were worrying about is gradually coming true. The world is growing highly connected by capital which wins and rages everywhere. Winners take all so no more idols. Goodbye Peter, Melvin & Hal.