It does Airplay from a Mac to the headset. You look at the Mac and then tap the "connect" button that appears in mid air above it. Apparently it's very seamless and has good latency.
What you don't get is Mac windows intermingled with AVP windows, it's just your Mac screen as one window that you can move about. It sounds good though, and there has been a fair amount of movement in screen sharing over the last few macOS releases which suggests more could be coming here (like multi-screen support).