(instant thread reactivation)
Holy fucking shit alert! Google just gave us we wanted.
http://www.google.com/mobile/goggles
You're at the Sydney Opera House and you want to know more about it. Take a picture of it. Google figures out what you just shot and tells you the detail.
You're in a bookstore and you want the full Amazon information on a book. Take a picture of the cover...
Somebody gives you their business card. Now you have to put their details in your contacts. Of course not, just take a picture of the card...
You're in front of a local restaurant and you want ratings and reviews for it... just point your phone at it, the GPS knows where you are and can fetch details.
Sure, you can take a picture of the UPC code... or the label on the bottle... more and more things will just "work" if you ask Google.
And soon,
do you want to know what kind of tree that is? Take a picture of the leaf...
The pertinent question has already been asked by Flint,
what to do with all this magic? - when there is more magic every day.