Kernel, a start-up company, are developing brain microchips that could help improve a person's memory or even help them delete their memories.
Speaking at Web Summit in Lisbon last month, Mr Johnson, the founder of Kernel, said: "I would expect in around 15-20 years we will have a sufficiently robust set of tools for the brain that we could pose any question we wanted. For example, could I have a perfect memory? Could I delete my memories? Could I increase my rate of learning, could I have brain to brain communication? ... I consider myself to be cognitively impaired because I am limited by my biases, by my blind spots. I don't want the limitations, I don't want those constraints, I want to break open."
Johnson also believes these brain chips could be used to help us understand each other better.
He added: "[Microchips will become] democratised, like smartphones. Imagine a scenario where I say 'I want to know what it's like to be a cowboy in the American west in the 1800s?' and someone creates that experience mentally. I'm able to take that and purchase that from that person and experience that.
"The bigger question on this is: 'Is working on this a luxury or a necessity? I don't understand what we are so scared of losing? I don't know why it would not be the singular focus of the human race because everything we do stems from our brain."
It is also thought it could be used to help patients with memory problems.
Johnson told New Scientist: "The idea is that if you have loss of memory function, then you could build a prosthetic for the hippocampus that would help restore the circuitry, and restore memory. The first super-humans are those who have deficits to start with."