The ongoing struggles with encoding the Book of Life.
If you pick up a book, do you see a biography of its author, an analysis of the chemical composition of its paper, or the share price for its publisher? Do you see a list of your friends who’ve read it or a selection of its best passages or a map of its locations or its resale price or nothing? The problem for Google’s brains, as it is for all brains, is choosing where to focus attention and computational power. As a Google-structured augmented reality comes closer to becoming a product-service combination you can buy, the particulars of how it will actually merge the offline and online are starting to matter.