I would like to propose two probably machine learning-based features, already implemented in Photoshop:
1. Image Liquify Auto-Tools for Faces
The software recognizes the main elements of the subjects face, exposing multiple useful controls to edit those single elements (example: both eyes) together.
2. Auto Subject Selection
The software recognizes the subject/subjects and auto-selects them.
I am attaching screenshots
PS: what happened to the Pixelmator Pro Extension for Photos?
What features would you like to see in Pixelmator Pro?
Thank you for you attention. Looking forward to see those features pop-up in future updates