> But by 2029, your wristwatch will be able to do those calcs.
Wristwatch? No, those will no longer exist. The brain-chip will simply display a heads-up display directly onto your retina (giving you the time in all time zones, along with your exact location), do your taxes, calculate orbital trajectories two millenia out, and project the fourteen most-likely-successful pick-up lines to the four-breasted genetically modified hottie in the corner.
Of course, if there's a "President Hillary" between now and then, that chip will *broadcast* your position, will modify your behavior, make you feel happy whenever Madame President appears (which will be every ten minutes) and will be mandatory.
But it still won't be able to figure out timezones in Indiana.
You sir; have NAILED it!!!!
(Kinda like one of those ST episodes where Wesley Crusher is about the only one not enslaved by the endorphin game....)