While Sherlock Holmes followed footprints, Jonathan Grave uses mobile phone technology, GPS, and the digital trails left by creditcards to track his targets.
Among the cool new features, iPhone 5 will come with a new Maps app with Siri-powered turn-by-turn directions and a Passport app that will store digital versions of your affinity cards, boarding passes, tickets, coupons and, eventually credit and debit cards, so you can get on a plane or into a stadium or pay for a Starbucks coffee by flashing a bar code on the phone.
This app is a first step into a digital wallet and the next iteration of the app could well be the integration with the 400 million creditcards that Apple has now on file.