… if you know how to use virtual desktops and shortcuts. You can’t look at two screens at a time, anyways.
One use case I can understand is having a 2nd monitor for checking stock prices or checking for a certain event. Other than that, I don’t see how it contributes to “productivity” while working or coding for example.
P.S: Tiling WM users may understand this post more
Funny how you seem to believe that “checking stock prices” is a good use of a whole monitor but don’t seem to see how literally any other task could benefit from having reference material up on a second monitor.