No; a lot of wires carry the actual power to the effector (e.g. a lam, or a motor, or a relay). WiFi, on top of being vastly more complex, has issues with electromagnetic noise, wave propagation problems, and thus delivery delays. And it needs a processor powerful enough to run all the logic with encryption on top, because you don't want strangers to talk to your devices.

A length of copper is so much more reliable.