Implants. Google will be able to project advertising directly to your retina before the next hundred Years are up. We have implants with medical substance delivery systems today. Soon you will all have been talked into getting 'chipped' for convenience, cashless payments, better VR experiences etc. Your implants will 'need' a constant stream of "security updates", to avoid getting hacked - no different from today's smart phones. You won't know what got changed or added in each patch besides what they chose to write into the patch notes. Not far from now, Advertisers and the Government will be able to deliver substances to your brain's emotional centers to enhance their advertising, whether they want you to buy deodorant or sign up to earn the bounty from killing your neighbor the 'potential terrorist' guilty of unauthorized removal of his implant. How long, before you can control your car or airplane without the need to touch things like steering wheels or pedals?