If you prefer to read real books as opposed to digital ones on your PC and you have a hard time comprehending the 'big words', or if you are learning a new language; Korean company Unichal has the perfect reading companion for you.
Here is how it works: The $90 Dixau reads along with you, scanning words with a camera and displaying them back on your PC with rich information supplements by Wikipedia and Google searches and any dictionary you add to it. Whenever you encounter something you do not comprehend, you simply refer to this wide array of info.
The technology does not break new grounds. You can look the words up yourself on your computer or on a digital dictionary. It simply makes the process more convenient and automatic. As DVICE pointed out, this would be a great application to have on your iPhone.