Which brings us back to augmented reality, the ultimate (or maybe just penultimate) outcome of this train. True augmented reality will rely on a semantic web (thanks tswindell) which will rely on rich metadata sets which really on standardization (such a dirty word), and the crux of Cory Doctorow's distrust:

http://www.well.com/~doctorow/metacrap.htm

...and a shameless self-plug for my data cloud series:

http://tabulacrypticum.wordpress.com...days-for-data/