In some old Unix systems there was a concept of "focus follows mouse", whereby the window underneath the mouse automatically had the focus.
This concept would be a useful option within ArcGIS Pro. The use case is working with multiple windows, eg a Map and Scene side-by-side. When the mouse is over the Scene, panning should apply immediately even in the Map previously had the focus. (Currently you must click once in the Scene to give it focus before panning, zooming, identifying etc can occur).
I envisage this as an option, not the default behaviour.