Canon has launched the EOS R3 as the "most technologically advanced full-frame mirrorless camera" it has ever produced. This is because it integrates the AI-based person- and even eye-detection features that allow the user to direct focus on what they are looking at through the EVF. The R3's CMOS is also rated to pick out and track specific subject types such as eyes and animals.
https://www.notebookcheck.net/The-Canon-EOS-R3-launches-as-a-mirrorless-camera-the-user-can-control-with-their-eye-movements.561546.0.html