Sure, if someone wants your credit card number, they already have it too. They just follow you around with a telephoto lens and take a photo when you remove your credit card to use it.

But if someone just wants a few thousand credit card numbers, and not yours specifically, that's when an ounce of caution can go a long way towards protecting yourself.

Therefore it's a good idea to use your fingerprints for authentication?

Governments do, but ordinary criminals don't. Yet.

This is a very important enabling technology not because it's new, but because it'll gain widespread use in a short time.

What else does this magical sentence work for? I want a million dollars.