It would be amazing if you could add touchscreens as a second mouse, although It's not exactly what I want.

What I would really like is that touchscreens work independently to your mouse. So let's say I have my mouse in the middle of the screen, if I touch and select something with the touch screen in the right corner, the main mouse will remain where it was, so I can move the mouse from where it was.

This is especially useful with two screens, one to use as a touchscreen and the other for the mouse. So if you interact with one screen you don't have to move the mouse again to the other one.