I think it was a healthy formative influence for me and primed me for rejecting fads / peer pressure, distrusting authority, etc. Probably also helped me to resist the more unhealthy aspects of a religious time/place, and I was even doing light reading on Cartesian skepticism a few years later, which got me into math. Didn't figure out the name of the movie until years later when it was a big meme.
This is not advice but I definitely advise you to show your small children this movie before they are old enough to think it's corny. They may have a schizophrenic episode or descend into solipsism sure, but they may also get scared as hell by monsters and learn some mental judo, and thank you for it later.
In short, aliens have invaded earth, but wear a special skin to appear human. To average people, they appear and sound identical to real humans. The lead character discovers that special sunglasses can show the aliens without their human-like skin. (They look a bit like the aliens from "Mars Attacks".) When wearing the sunglasses, most outdoor adverts are replaced with bland single-party-state-style propaganda encouraging people to consume, work hard, and follow the rules.
I can honestly say that the trailer does no justice for the film. It is much better than the trailer. When I saw first saw this, I was genuinedly spooked. One half of the film is good fun 1980s alien invasion beat 'em up, and the other half is a thoughtful commentary on the age of consumerism.
https://addons.mozilla.org/en-US/firefox/addon/artificial-cl...
it replaces terms used to exalt Artificial Intelligence to what they really mean, and some tongue in cheek jokes against things that are used to pass billionaires/tech as friendly (e.g. replacing bill gates with his actual name)