If you are driving, CoPilot GPS is a great turn-by-turn navigation app. It downloads the entire map to your device, so does not require data use.
Also, my wife enjoys WordLens for translation, although I find it eats batteries.
I also like InstaPlace and Instagram for sharing my experience.
We already have cameras that can recognize, record, and interpret license plates. It's only a matter of setting up the technology to recognize and read road signs. Once this is done and fed to a computer the possibilities are endless.
Google is on this already: http://questvisual.com/
OK -- that's really weird. I still have it installed and working on my Galaxy S5 as "Word Lens Translator," but apparently it's been assimilated by the Goog and rolled into Translator.
http://questvisual.com/ this app might be your answer. It translates language in real-time.
EDIT Chinese right? It kinda hard to scan but the last bit says "please retry" or "shutdown after", if you can get a clearer image, I'll scan it again.
Google bought the company that made the Word Lens app, which is where this functionality comes from. The translation is still pretty literal, but it's bloody magical. As an English speaker in Germany, I use it all the time on menus and forms.
Uh, I forgot: In the moblie world we will see more and better agumented reality services/applications: Take a look at WordLens, this is so awesome, and this is what can be made with current technology.
Finally created a reddit account just to tell you about Word Lens. It basically is OCR on the fly on mobiles.
Currently it's only on iPhone and only does English to Spanish and vice versa. The completely useless feature for you is that it actually replaces the text it sees in the image, projected on to the surface in augmented reality. It is no stretch that it could read aloud or braille'ize any text it sees instead of translating it. I wonder if they've thought of how useful the app could be for the blind. On the Quest Visual web site, they don't mention it as one of their upcoming features. Perhaps you should suggest it to them. :)