A commenter on the TED site points out that you could use it in museums to learn more about the artefacts. It could have scary applications, like seeing data about people (though it would be an interesting ice-breaker at parties). But that is the case with all new technology.
The aspect of this that beats being able to browse the web from your mobile phone is that it selects the information you need instead of you having to searchfor it; so it knows you're looking at a book or a newspaper and reacts accordingly. How? How does it know?
Anyway, in short, I want one of those.