Five Sci-Fi Scenarios That Will Come True

As seen in the film "Minority Report"

In a few years, we'll be using fingerprint, voice, iris, or retinal scans to log on to Web sites and make purchases. Sounds a lot better than storing passwords under your keyboard, right? But remember: Your body is your password--so don't lose it.

(Image copyright 20th Century Fox)

As seen in the film "2001: A Space Odyssey"

Space isn't merely the final frontier, it's also the hot new vacation spot for the megarich. Richard Branson's Virgin Galactic plans to launch its first suborbital space flight in 2009 (cost: $200,000 per ticket). NASA predicts that the first space hotels will appear within 20 years. When you get turndown service at the Lunar Hilton, will the attendant leave a moon rock on your pillow?

(Image courtesy of GalacticSuite.com)

As seen in the TV show "Star Trek: The Next Generation"

The long-predicted virtual-reality revolution may finally be imminent, thanks to the popularity of 3D movies and of online worlds such as Second Life. A future "holodeck" could be enhanced by scents shot at your nose by a "smell cannon." Japanese researchers are working on the device now.

(Image copright Paramount Pictures)

As seen in the film "2001: A Space Odyssey"

Though unlikely to turn murderous (in contrast to the late, lamented HAL 9000), machines driven by artificial intelligence will, within 15 years or so, be handling many routine tasks.

(Image copyright MGM)

As seen in the TV show "Lost in Space"

Take a numba, Roomba. One technology expert predicts that by 2025 robots will outsell cars worldwide. So how will the ones without cars get to work?

(Image copyright 20th Century Fox)

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