Scrolling is perfectly smooth when you use a trackpad. IMO, clickwheels are a legacy technology for scrolling (even when I use Windows, I left-hand a Magic Trackpad so I still have smooth analog scrolling).
I never liked trackpad. I am an avid RTS player, the mouse is by far the superious input device.
Besides, I never work on a laptop.
And this is a lame excuse. Smooth scrolling should also work when using keyboard with and pageup/pagedown, at least as an option and with some tuning preferences.
Used to have a mouse that had a scroll wheel that would toggle if it did the clicking motion or a smoother scrolling motion, I loved that one. I use Trackbals now, so if I need to scroll drastically I use the sidebar. Source Code map sidebar is the best though.