l
Quite sure you cannot stereopair M3.
You can. It’s a standard google feature and M3 supports it. However it only works with chrome cast (same as BS1 GVA) and doesn’t work if you use NL or AP2. so, that’s not really exciting to me.
What is cool is what you hear as rumor that i can use beosound products as surround speakers steered by a beovision (or maybe even future stage). this would be a sonos-like feature, which would replace the need for wisa.
I think it's a standard Google Chromecast feature to get two speakers to play the same track simultaneously, like in a group, but not necessarily in stereo (split L and R channels).