Sure, you're right that we will at some not too distant future get rid off the Smartphone. My guess is that it is replaced with AR glasses which simply place all information you currently view through the display of the smartphone and your neural implants come sometime after that.
On those, that is the point where I will gladly let others be the early adopters though and will be just a bit more cautious than I usually am with new tech. I remember having read about e.g. brain lobotomies some medical doctors thought were a good way of addressing neural issues which resulted in the patient being turned into a kind of zombie.
This is probably one of the most infamous cases (copied from Wikipedia), the really awful story of one of the Kennedy's children:
"Placid and easygoing as a child and teenager, the maturing Rosemary Kennedy became increasingly assertive and rebellious. She was also reportedly subject to violent mood changes. Some observers have since attributed this behavior to her inability to conform to siblings who were expected to perform to high standards, as well as the hormonal surges associated with puberty. In any case, the family had difficulty dealing with her stormy moods and reckless behavior. Rosemary had begun to sneak out at night from the convent school in Washington, D.C., where she was cared for and educated. Her occasional erratic behavior frustrated her parents, who expected all of their children to behave appropriately, be goal-oriented, and act competitively. Joseph P. Kennedy, Sr. was especially worried that his daughter's behavior would shame and embarrass the family and possibly damage his political career, and those of his children.
In November 1941, when Rosemary Kennedy was 23, doctors told Joseph P. Kennedy, Sr. that a neurosurgical procedure, lobotomy, would help calm her mood swings and stop her occasional violent outbursts. He decided that his daughter should have the lobotomy performed; however, he did not inform his wife Rose of this until after the procedure was completed. Rosemary was strapped to the operating table. James W. Watts, who carried out the procedure with Walter Freeman of Wingdale Psychological and Correctional Facility, described what happened next (as narrated by Ronald Kessler):
We went through the top of the head, I think she was awake. She had a mild tranquilizer. I made a surgical incision in the brain through the skull. It was near the front. It was on both sides. We just made a small incision, no more than an inch." The instrument Dr. Watts used looked like a butter knife. He swung it up and down to cut brain tissue. "We put an instrument inside", he said. As Dr. Watts cut, Dr. Freeman asked Rosemary some questions. For example, he asked her to recite the Lord's Prayer or sing "God Bless America" or count backwards..... "We made an estimate on how far to cut based on how she responded." ..... When she began to become incoherent, they stopped.
After the lobotomy, it quickly became apparent that the procedure was not successful. Kennedy's mental capacity diminished to that of a two-year-old child. She could not walk or speak intelligibly and was incontinent.
[...] In response to her condition, Rosemary's parents separated her from her family. Rose Kennedy did not visit her for twenty years. Joseph P. Kennedy, Sr. did not visit his daughter at the institution. [...] By , Rosemary had learned to walk again but did so with a limp. She never regained the ability to speak clearly and her arm was palsied. [...]Rosemary Kennedy died from natural causes on January 7, 2005."