Something clearly forseen by Philip K. Dick:
The scramble suit was an invention of the Bell laboratories, conjured up by accident by an employee named S. A. Powers… Basically, his design consisted of a multifaceted quartz lens hooked up to a million and a half physiognomic fraction-representations of various people: men and women, children, with every variant encoded and then projected outward in all directions equally onto a superthin shroudlike membrane large enough to fit around an average human.
As it turns out, they have artificial voices as well, leaving “in our minds no characteristics.”
The part that always intrigued me the most in the book is when the main character is in the room with a holograph of himself without realising this fact:
The protagonist is Bob Arctor, member of a household of drug users, who is also living a parallel life as Agent Fred, an undercover police agent assigned to spy on Arctor’s household. Arctor/Fred shields his identity from those in the drug subculture and from the police.
When performing his work as an undercover agent, Arctor goes by the name “Fred” and wears a “scramble suit” that conceals his identity from other officers. Then he is able to sit in a police facility and observe his housemates through “holo-scanners,” audio-visual surveillance devices that are placed throughout the house. Arctor’s use of the drug causes the two hemispheres of his brain to function independently or “compete”. When Arctor sees himself in the videos saved by the scanners, he does not realize that it is him.