Test case: Run webbrowser-app on a system with a nice big touchpad, under Unity7 and under Unity8.
You will find you have high-resolution precision to scroll very finely under Unity7, but not in Unity8.
Also, don't use System Settings as a test because that one has very broken touchpad scrolling even under Unity7 (!?) -> bug 1605513
Test case:
Run webbrowser-app on a system with a nice big touchpad, under Unity7 and under Unity8.
You will find you have high-resolution precision to scroll very finely under Unity7, but not in Unity8.
Also, don't use System Settings as a test because that one has very broken touchpad scrolling even under Unity7 (!?) -> bug 1605513