Sure. Need ‘focus-events’ for binding on init stage (constructor) in widget, for example.
It would be help for develop navigation menu systems specially for gamepad/keyboard input.
But 1st step with visual/audial stuff for ‘focus’ is not really need. Possible just use ‘hover’ for dat in WidgetBP logic like so.
Any way if using keyboard/gamepad and mouse at same time need always to check what is your primary input device (to hide mouse cursor or not until mouse doesn’t move/use).
If 2nd feature request will be, it would be nice.