Artificial cardiac pacemaker
The device can record and transmit body measurements and control and regulate them. Unlike Wearables, e.g. Apple Watch, which you can get rid of, you are not able to get rid of a chip easily: you will probably need a medical operation in order to take it out from your body.
Actually a limited version of that vision is already a reality. For example, the Artificial cardiac pacemaker, which maintains an adequate heart rate. Wearable cardiac pacemakers are available since 1958. Modern cardiac pacemakers are implantable and are externally programmable.
Some people see the bright side of this feature.
I would like to discuss less bright non-technological aspects and one technological issue.
Lack of Privacy is a major problem in an Internet driven world. You can read a post I wrote in 2010 titled: Your private data is Unforgettable. That was the motto of Prof. Victor Mayer-Schönberger's keynote presentation in Israeli Wikimedia Academy 2010 conference. Once your private data is in the Web it will be there forever.
The Privacy issues of a Digital Human Being (this is the term I will use for someone with implanted computing device connected to the Web) is more sever than the Web Privacy issues.
For example, his location is always known. If you are a lost child, it is good to know were you are, but if some authorities in a totalitarian country or some criminals do not like you, you have no place to hide.
"He who controls the past controls the future. He who controls the present controls the past." George Orwell, 1984
This issue is closely related to Privacy.
Big Brother will be watching you all the time.
Is the radiation a risk to the health of a Digital Human Being? I do not know, but the risk of damage to health condition should be checked systematically.
For example, Would there be sleep disorders due to implanted devices? I do not know but it should be checked.
Risk of Dying
I am not joking. I am discussing Security issues. Nobody is happy when somebody gains remote control over his PC and can do what ever he likes in his PC.
Controlling you PC is nothing in comparison to controlling your body via the device implanted in your body.
If he will manipulate the body measurements data, it could even cause death. This could happen if the device regulates body activity based on data, same as Artificial heart pacer is regulating the heart pulse rate.
If the risk is similar to the risk of distorting heart pacer patterns, why is not the risk similar to the risk of distorting heart pacer patterns?
Artificial heart pacer are implanted if and only if the heart does not function properly. Probably the people carrying it have no other choice.
The vision is about device implanted in everybody including many healthy people. Healthy people should have a choice.