Gattaca, like all he very best sic-fi, tells a tale yet manages to deal with broader human issues. It is set in a future where discrimination has now become a science, but it is not based on gender or skin colour but on your genetic code, your DNA. Many children in the society portrayed are genetically designed and have any flaws or imperfections designed out by scientists. The world is now divided between those lucky ones whose parents chose or could afford this route, and the rest, who for whatever reason end up being born naturally.
There clearly is a trend of science-fiction more and more aspiring to enter the mainstream. Transcendence is another such attempt, using several big name stars like Johnny Depp, Paul Bettany and Morgan Freeman to reach a broader audience for its story.