A Human carrying a smartphone is also a Mobile Cyber-Physical System

I think this type of mobile human cyber physical system will eventually morph into something else where people have micro devices either in the form of necklaces or bracelets or even something like internal hearing aids like Spies often wear to communicate with each other through blue tooth in their phones. As time goes on likely your computer will become more and more verbally interactive through various microminiaturized devices either worn or embedded into humans through ear canals or like I said before bracelets or necklaces or in other ways. Glasses could also double as video screens for displaying all sorts of information, especially sunglasses which dampen sunlight outside which allows better definition of a projected video screen on the inside of sunglasses.

However, then you have the problem of: "Can you walk and chew gum at the same time". For example, many places are making walking while texting illegal because of the number of people bumping into each other or being hit by cars or buses or trucks and dying while texting on their phones. So, not only texting while driving is becoming illegal all over but also texting while walking or bicycling too. Sitting concentrating while not moving might be the safest way to interact with media in the end. However, many people are okay talking on a phone while walking still but some have trouble driving or flying a plane while talking on a phone or other media.