Yes, in that it allows for more efficient use of them. If your wiring is currently old or malfunctioning, so too will your appliances malfunction. Out of date wiring takes a toll on your household electrical goods as it is harder for the electrical current to be distributed evenly across all of them, meaning overloads and blown fuses are more likely. A full or partial rewiring can solve this problem by updating your wires and trunking to more modern and regulation compliant materials.