Star Trek: TNG and the modern version of The Outer Limits. But Gattaca is one of those few films that uses truly plausible technological advances to illustrate how those advances might change our society. Specifically, if we could instantly read a persons genetic code, from zygote to full grown adult, and from that obtain a wealth of information about them, from future diseases to physical traits and abilities, what would we do with that information? Would it affect the way businesses hire employees? How about university admissions, military recruiting, and dating choices? Naturally there would be privacy and discrimination issues involved, but in Gattaca we see a society that has fully accepted this information as no less public than a driver's license. And discrimination laws are not very enforceable.
In one of the early scenes, we see a couple consulting with a doctor about having a child. The technology exists that allows the doctor to collect both eggs and sperm samples from mother and father and then create via test tube a small set of zygotes free from genetic diseases and possessing the most desirable traits. He presents the possible child profiles to the couple and allows them to choose their future child's gender and other traits. Once selected, the chosen embryo would be implanted into the mother's uterus so she could carry the child to term. The scene was memorable to me precisely because of its haunting future plausibility. I love this quote from the doctor after the parents voice concerns about over prescribing their new child's future - "Keep in mind that this child is still you, but simply the 'best' of you. You could conceive naturally a thousand times and never get such a result". Who wouldn't go for that?