The Google Vision concept is a cell phone sized devise with a roll-up flexible screen. The device would have image recognition and a GPS so you could figure out where you are by letting the device look around.
"The only "downside" is that physical objects would need to be indexed somehow. The best way to do this would be via a Wiki somehow -- it would require volunteers with digital cameras taking pictures and feeding them to the image recognition database, along with GPS coordinates -- a kind of Wikipedia for images." - Personal Tech Pipeline