It seems to me there is a lot of risk in that if the technology is not sufficiently decentralized. It's still possible today, if you want to unplug, to just turn the smartphone off and leave it at home. We can pay for things in cash and use public phones (or borrow someone else's) to make calls.
The more indispensable, unobtrusive, and portable the tech becomes, the harder it gets to escape from it. Done poorly, I could see it becoming an avenue for unprecedented centralized control.