This was showcased during the iPhone 8 reveal. Looks like ARKit is going to deliver some amazing augmented reality opportunities!
“The Machines” by Directive Games is a tabletop game where opponents fight over a map in real time and on a household tabletop. While details are scant, the tracking appears to be handled via a hybrid of the iPhone 8’s camera and a multitude of sensors.
Whatever they are doing, it appears to work! Very impressive.