I'm not sure I understand the question, what are the advantages? Same advantages you would get by making use of any wireless speakers. This system is a nice and powerful sounding amp, making use of Bluetooth, Airplay, Yamaha's Musiccast, and party mode via wifi. Anything you play through the receiver, you can transmit to the wireless speakers.
I have even been able to connect Bluetooth to my Amazon Echo, while still making use of Musiccast. It has the advantage of sending and receiving Bluetooth signal at the same time. Most receiver can do one or the other.