Wrong. Eventually humans will integrate their bodies with their technology to the point that the "machines" become part of the being itself.

Eventually metal and plastics will be replaced by proteins and other organic materials. Once our integrated technology reaches the point where it is completely self sustaining/replicating and is passed on to our children through the normal course of procreation we will cease to be Homo sapiens and will become Homo Superior: the next phase of our evolution. The first phase we engineered ourselves. It's a foregone conclusion.

We will no longer interface with our mechanisms, we will become them.