Newer Macs Can Use Another Mac as an External Display on macOS Monterey

One of the key new features of macOS Monterey is the ability to AirPlay content to a Mac from other Apple devices, such as an iPhone, iPad, or another Mac. According to the macOS Monterey features page, AirPlay to Mac works works both wirelessly or wired using a USB cable, with Apple noting that a wired connection is useful when you want to ensure that there's no latency or don't have access to a Wi-Fi connection.
AirPlay to Mac also allows users to extend or mirror an Apple device's display to