I see most people so far don't want this as default. I would appreciate if someone would tell me why.
In my experience all mice has some resistance on the scroll wheel, so it's highly unlikely anyone scrolls by accident. There's nothing that happens on scrolling on the desktop, and nothing to do there.
Today you can three finger scroll if you have a touchpap. But if not you have to use the keyboard or move cursor to upper left corner, then to the bottom middle to open the App list.
#gnome