I clicked "Slideshow" while connected to a projector and this pop-over was displayed.
I was about to start my meeting so I didn't have time to tinker with it.
This really isn't the best time to tell me about new features. Worse off, if I happened to be interested, but not able to explore they didn't offer any information about how to get back to this.
The button label was off-center. I clicked anyway.
This pop-up was displayed.
Notice the bottom-right corner has a system status label "listening."
Here is a detailed view of the pop-over:
I clicked the "Got it" button, and this was displayed:

Again, why is the button label off-center?
The feature seems interesting, but that is not the time to tell me about it.
Perhaps a learning mode or check my calendar, it is integrated.