Describe the new feature:
Make webdriver be platform compatible:
mobile platform -> touch
desktop -> mouse, unless touch simulation enabled.

Progress

• Implement pointer Id: webdriver: Implement Pointer ID #39642
• Fix spec for subtype passing: Pass subtype to "create an input source" w3c/webdriver#1929
• Choose our own path until spec resolution: Element click behavior on touchscreen devices w3c/webdriver#1925 (comment)
• Implement in a compatible way for "Element Click"
• Support it for Perform Actions.
• Determine pointer-type at runtime, which would enable us to simulate touch with "Element Click" in Desktop. Vice versa in mobile.

Missing in the picture is subtype: Pen. I guess we are not there yet.