Man/Machine symbiosis
We are already more intemately hooked into our machines than we know! Think about it.
At the gym you touch two panels on the latest machine and it tells you your heart rate. Forming an intimate feedback loop of higher rate lower pedal speed or slow heart rate higher pedal speed, it already resembles the hypothalamic pituitary axis’ many feeback loops.
Consider that your alarm clock already aids your brain in keeping correct time. In return you give it energy, you repair it, clean it etc. The basis of a symbiotic relationship.
I could go on and on! Simple examples first: your pocket calculator. It largely replaces your brain’s calculation centres. Just because it is an external object, doesn’t mean that it is not part of you!
I am not even going to mention larger machines! The latest in medical research already suggests that our brain regards objects we use as part of us on a neuronal level. Remember how you flinch when an oncoming car approaches you too fast. It nearly hit your car, not you! What about a scratch on you cars deuco? I think that it’s far more than just the cost that is bugging you. Your mind considers it to be a part of you.
We are more intimately connected with our environent and our machines than we think!

And that’s why we need a good dose of Protestant existentialism to recognize that these things are not us.