Apparently the eye scanners from Minority Report are now a reality.

From USA Today:

The Homeland Security Department plans to test futuristic iris scan technology that stores digital images of people's eyes in a database and is considered a quicker alternative to fingerprints.

Iris scanners are little used, but a new generation of cameras that capture images from 6 feet away instead of a few inches has sparked interest from government agencies and financial firms, said Patrick Grother, a National Institute of Standards and Technology computer scientist.

This could be interesting. As long as the technology isn't abused or overused, it certainly seems like it could have valid applications - but who knows how it'll actually turn out. I'm not looking forward to personalized holographic advertisements that track you by your irises, though.