They'd just be looking at the palm rest for me. Laptop is closed and under the monitor stand, having it open just makes Window's show how well it does desktop scaling.
I’ve previously used this wonderful piece of software, which doesn’t really improve that situation much, IIRC, but does make it easy for mouse movement to line up super nicely by using DPI-aware scaling:
Yeah, my son convinced me to try having one monitor vertical. His (Windows 10) is close to right, but dragging a window across the gap and you have 2 different size windows. Compared to my computer (LMDE) and it is truly scaled correctly, the window is the same size on any monitor and while travelling between them.
Still not sure how I feel about a vertical monitor though, it's great for documentation but just feels so unnatural.