For streamer groups it would be such a nice feature, as they would be able to stream all their perspectives without having to create multiple Twitch accounts for that, which might not be even an option.

I do a stream every Friday where I play multiple games of chess blindfolded while solving multiple Rubik's Cubes blindfolded and memorizing shuffled decks of cards simultaneously. Trying to cram all of the pertinent visuals and camera feeds onto the screen is doable when it's just 2 games of chess 4 cubes and 2 decks of cards, but when I get to 3 games of chess 3 cubes 3 decks it'll almost certainly not fit, anything more than that definitely won't fit.

Stream highlight for reference (https://www.twitch.tv/videos/1038837549)

Even if the feature wasn't available to ALL twitch streamers but you could fill out some information and get access to the feature on a trial basis that would be tremendously helpful.

Making the Command Center available to everyone would open up so many possibilities.
Multi-camera setups for cooking or social streams in general.
Dev streams where each stream-node shows a different part of the developing process.
I do believe the possibilities are endless.