Upon further reflection this is a wonderful idea! A mirror on the webcam reflecting the screen light back, and AI/ML watching the screen's reflection of the fi

Upon further reflection this is a wonderful idea! A mirror on the webcam reflecting the screen light back, and AI/ML watching the screen's reflection of the finger to see when it touches, can clearly see a touch event. This idea was also re-invented by Carmen Castrejón, as a teaching aid during Zoom classes. https://www.boredpanda.com/teacher-shares-screen-hack-zoom-class/?utm_source=google&utm_medium=organic&utm_campaign=organic https://www.boredpanda.com/teacher-shares-screen-hack-zoom-c... She uses a CD as a mirror to point at a pen and paper, with maths homework. Likewise, we can use scrap CDs on the corners of the office, to help people see motion and not collide (bus contention) when turning sharp 90º angles walking out of the washrooms or kitchenette or lab, back into the grid squares of open-plan desks.