I am really looking forward to this feature. Maybe I'm alone in this but I have constant connection issues switching between my Mac and phone when using AirPods (especially frustrating when answering calls).
You're definitely not alone. Switching my airpods from phone to laptop is always a frustratingly long process. First have to select my airpods in the audio list, wait 15 seconds until my airpods make a boop noise. They're not connected yet though, my mac will switch back to internal audio almost immediately. Need to repeat the process again before they will actually connect.
At least going the other way I only have to select the airpods once in the phones bluetooth device list.