Screen Mirroring

Hello bit carver,

Regarding AirPlay, the feature is used to stream video from an iOS device to a TV

or a Mac. The article you started from has great information. Use AirPlay to stream video or mirror the screen of your iPhone, iPad, or iPod touch

While you can't use the iPad a display for your iPhone, you can use it as a second display for a Mac. You can find helpful information here: Use an iPad as a second display for a Mac - Apple Support

Cheers.

Hello bit carver,

We were happy to help pass along information on that. If you happen to wish to provide feedback then you may do so via the dedicated feedback site here: Product Feedback - Apple

Cheers.