The Studio Display will be supported too, obviously. Another tidbit from Apple’s support document: You can connect your iPhone to an HDMI display or TV with a USB-C to HDMI adapter or cable. Adapters ...

On an iPhone or iPad, use a Lightning cable (or ... For pure screen mirroring, you'll need a USB-C to HDMI cable. To connect a Samsung Galaxy S, Note, or Fold to your TV, hook up a USB-C to ...