After having the book almost finished I found The Sixth Sense Project, while researching language & culture technology at my regular job.
'SixthSense' is a wearable gestural interface that augments the physical world around us with digital information and lets us use natural hand gestures to interact with that information.Same idea, just more advanced and compact two decades from now. Users do tend to get immersed in their own little world of sight and sound, paying even less attention to what is going on around them than they do now.
The devices have a high processing and storage capacity.
Live video chat is not used much, since most people under the age of 35 are wearing their main communication device on their face. People a bit older still tend to use "ancient" or "fossil" wireless phones and they tend to use video chat and text.
All of the devices can be "anonymous", but information collected as the device is in proximity of other devices quickly sets up targeted advertising unless the user takes the trouble to block ads.
The US government is prohibited from analyzing user data unless it is paid for on a government issued credit card, i.e., "stimulus card".