When man first learned how to harness electricity he discovered that it was possible to direct an electrical current using wire.
Later he discovered that some metals work better than others, ie. gold is much more efficient than copper.
Man's design has problems however, for one it isn't water proof, for another it is inefficient, there is always a loss of current. Man's design will eventually corrode, it is subject to interferance, and on and on.
What these scientists have done is to grow synapse nerves in a labratory. The synapse nerves are what brains use to conduct and to transmit electrical currents.
They are incredibly efficient, they are water proof, you can even run an entire human body, billions and billions of simultaneous transmissions every milisecound from a small brain.
No wires needed!
God's design is truly incredible.
I pray that the better we come to understand His design, the better equipped we will be to help others overcome medical problems.