This concept has existed for years in third party apps. All the major manufacturers are late to the game…

As someone who paid for the best of those third party apps before… Apple has done a much better job. It’s not even close.

For example my iPhone can be turned off, locked, and in my pocket, but the camera is still discoverable and able to be enabled on all my Macs and even my TV. Simply select the camera like you would any other and put it some kind of mount.