Horizon Workrooms offers keyboard passthrough, which works amazingly well. You just see your keyboard in VR along with your real hands, when you look down. No more touch typing!
Exactly. It's AR. It basically overlays the video at exactly that part in VR.
This is the "reverse" approach to AR. With Hololens etc. you see the real world and they overlay the screen over your real world. With the Quest, it's called passthrough, and you see everything on screens but real-time video from the real world is mixed in.