It depends if you have power sockets near to each speaker. Instead of signal cables for rear, side speakers half way around your room you only need a short power lead. Less effort than fitting trunking in shirting boards to hide the cables.
I have active speakers that have both mains and wired analogue cables going into them. Speakers with remotes also have a lead between the primary and secondary. WiSA enables remote control with no signal or control cabling needed.