Matter

Matter is a bold new initiative by the Connectivity Standards Alliance
It is a royalty-free standard
Its aims to build a single unified protocol for devices that operate using Ethernet, WiFi, Thread and Bluetooth, allowing different products, brands and ecosystems to work together.
Basically this is about the smart home so a protocol to control smart locks, lights, thermostats, etc. but it might also come to audio.
It is backed by giants as Google, Amazon and Apple.

Matter is scheduled to launch in autumn 2022.

Hard to say what the impact will be for audio but it might be it will take off where UPnP/DLNA stopped and eventually take over.

Matter: The Foundation for Connected Things