You buy & sell things from something that you hold in your hand. Special eyeglasses can also provide for plenty of shopping & entertainment.
Back in the day, there wasn't the concept of data-glasses & handheld devices that could be used for global tracking, buying & selling.
http://biblehub.com/revelation/13-16.htm
Today for many people, the transmission of data through a handset or data-glasses isn't a big deal. Eventually, it could become very convenient to have much smaller things in the hand or on the forehead.
As it so happens, the eyes are very close to the forehead & so are data-glasses.
http://ca.finance.yahoo.com/blogs/dashboard/ces-2014-toronto-interaxon-makes-wearable-tech-splash-205538988.html
Technology can be so cool, convenient & liberating, but there is always a dark side as to how it can be applied or forced upon the masses.
http://www.redicecreations.com/article.php?id=28382
There is fantastic tech that can help to mobilize the crippled & aged.
http://gizmodo.com/a-mind-controlled-exoskeleton-will-kick-off-2014s-socc-1493046675
Of course, in some cases special biochips could improve the integrated human & mechanical interactions.
http://www.youtube.com/watch?v=cU1-YFbAifA
Can consciousness really be transferred from a dying body into an A.I. program of the persons mind?
http://en.wikipedia.org/wiki/Transcendence_(2014_film)
Or is it just an elaborate copy & imitation of their mind?
At a certain point some curious & suspicious people wont like the idea of being tracked like cattle in the human resource livestock system.
http://www.theverge.com/2013/11/12/5082666/the-edge-of-the-abyss-exposing-the-nsas-all-seeing-machine
http://en.wikipedia.org/wiki/Biochip,
http://www.av1611.org/666/biochip.html,
http://www.youtube.com/watch?v=clIiP1H3Opw,
http://news.cnet.com/8301-17938_105-57610486-1/implanted-bluetooth-biochip-gets-under-hackers-skin
Robotics and A.I. -
http://www.youtube.com/watch?v=8zP7yP8hdLE
http://www.secretsinplainsight.com/2011/08/13/666
http://therabbitportal.blogspot.ca/2014/01/isaac-asimov-predicts-what-world-will.html
Machines & technology in general is not simply good or bad, its how they are each applied towards various scenarios & things.
http://shop.toporek.com/pages/about-the-work, http://vimeo.com/2529910
As is the case with symbolism & communication as well. All we can do is try to be aware, informed & vigilant as much as possible. Please see, http://www.bewareofimages.com for more perspectives.