In the
Apple iPhone video (5 minutes in) they discuss the exacting engineering tolerances required to produce the iPhone 5. The variances are now measured in
microns!
One stand out example is to get the logo inlay incredibly flush they assess 725 cut iPhone cases for the best match.
This level of precision is something that I see in sci-fi as indicative of advanced species (e.g. When the door to the ship is such a close fit that it is almost imperceptible). That humanity is now getting to this tolerance on a mass produced scale is possibly indicative of a marker that will be used by future historians.
