Jono Bacon posted a video of running Unity 8 on Mir using a MacBook Pro Retina utilizing the full resolution of 2880x1800 pixels

This demo (of the phone/tablet part of Unity, the desktop interface is coming later) is running on a MacBook Pro Retina utilizing the full resolution of 2880x1800 pixels and using Intel HD 4400 graphics. The performance is already looking great, and the team haven't done a deep dive into performance optimization yet.

  Unity 8 on Mir Demo