From The Singularity is Near by Ray Kurzweil

 

The 2010 Scenario. Computers arriving at the beginning of the next decade will become essentially invisible: woven into our clothing, embedded in our furniture and environment. They will tap into the worldwide mesh (what the World Wide Web will become once all of its linked devices become communicating Web servers, thereby forming vast supercomputers and memory banks of high-speed communications and computational resources. We'll have very high-bandwidth, wireless communication to the Internet at all times. Displays will be built into our eyeglasses and contact lenses and images projected directly onto our retinas. The Department of Defense is already using technology along these lines to create virtual-reality environments in which to train soldiers. An impressive immersive virtual reality system already demonstrated by the army's Institute for Creative Technologies includes virtual humans that respond appropriately to the user's actions.

 

Similar tiny devices will project auditory environments. Cell phones are already being introduced in clothing that projects sound to the ears. And there's an MP3 player that vibrates your skull to play music that only you can hear. The army has also pioneered transmitting sound through the skull from a soldier's helmet.

 

There are also systems that can project from a distance sound that only a specific person can hear, a technology that was dramatized by the personalized talking street ads in the movie Minority Report. The Hypersonic Sound technology and the Audio Spotlight systems achieve this by modulating the sound on ultrasonic beams, which can be precisely aimed. Sound is generated by the beams interacting with air, which restores sound in the audible range. By focus­ing multiple sets of beams on a wall or other surface, a new kind of personalized surround sound without speakers is also possible.

 

These resources will provide high-resolution, full-immersion visual­ auditory virtual reality at any time. We will also have augmented reality with displays overlaying the real world to provide real-time guidance and explana­tions. For example, your retinal display might remind us, "That's Dr. John Smith, director of the ABC Institute-you last saw him six months ago at the XYZ conference" or, "That's the Time-Life Building-your meeting is on the tenth floor."

 

We'll have real-time translation of foreign languages, essentially subtitles on the world, and access to many forms of online information integrated into our daily activities. Virtual personalities that overlay the real world will help us with information retrieval and our chores and transactions. These virtual assis­tants won't always wait for questions and directives but will step forward if they see us struggling to find a piece of information. (As we wonder about "That actress. . . who played the princess, or was it the queen. . . in that movie with the robot;" our virtual assistant may whisper in our ear or display in our visual field of view: "Natalie Portman as Queen Amidala in Star Wars, episodes 1,2, and 3.")