2. We would have robots that are so human-like, they require a test to distinguish between humans and robots.
Despite recent advances in AI, we don't have replicants, and modern robots are definitely not easily mistaken for humans.
3. In Blade Runner's 2019, smoking was still common, even indoors.
Many states in the US have banned or limited smoking indoors in a public space, including California, which is where "Blade Runner" is set.
The movie didn't see the rise of vaping coming.
4. In the film, people have colonized parts of space.
Today, despite the hopes of tech execs like Elon Musk, we're still years away from that being a reality.
5. Polaroids play an important role in the film, and digital photos don't really exist.
Polaroids are still around today, but they're mostly for fun and not anyone's primary way of taking and storing photos.