The implant does not seem to have detached Peter from all of his feelings and emotions; rather, it seems like it has made him determined to stay in his current course of action, however illogical it might be. Using pure logic, is Peter doing the right thing for the resistance movement? Are his actions logical, really? Resorting to acts of terror out of a desire to hurt the Observers is ultimately not going to solve anything.
Peter is wasting time and energy treating the symptoms, and not the cause. He might have killed the top lieutenants and might succeed in killing Windmark, but others will no doubt rise up in their stead. In his drive to win the war against the Observers, Peter is acting like a rogue agent, wasting time, energy and resources without addressing the root cause. Even worse, because all Peter wants is revenge, his actions can be equated to what the Observers are doing, again highly ironic as it is to revenge Etta, who died fighting the Observers because of what they were doing.
Which leads me to wonder, is this what the Observer was warning Peter about in “Through the Looking Glass and What Walter Found There”? Because he has been implanted with the tech without any form of supervision or preparation, or perhaps even at this advanced an age, could it be that Peter has become, in a way, a super villain, controlled by his base impulses but convinced that he is controlled only by logic? This is an even more terrifying thought than Peter becoming “just” an Observer.
Similarities with The Matrix abound; in sharp contrast to the care with which Neo was prepared and trained to use his never-before-used body in the real world, Peter is being thrown into a new world without any sort of preparation. What are the effects of this tech, inserted without any other consideration or training or preparation, on Peter’s brain? We are already seeing some consequences: Peter’s bleeding ear and the “episode’” in the car; is there going to be an overload of his brain? Will it alter and become like an Observers’? Furthermore, what mistakes is Peter going to make? Not having been trained to use this technology, he is a like a little boy, playing with adult toys; what mess is he going to create?
What a parallel to what Walter is going through! Based on a plethora of false premises, the son is consciously losing his humanity, while the father is struggling to keep his. How sad that Peter forgot about being “a better man than [his] father”! How sad that Walter was not able to turn his mistake into a learning moment for Peter! What will the consequences on the timeline be, if the boy who should not have lived becomes an Observer?