I am still skeptical as to how you can use a pencil on a trackpad while staring at the screen, when you need to move mouse from point a to point b, how will the screen track the pointer of the pencil?
I understand pencil working on a screen, but don't see how it could possibly work well like this. Unless you somehow got a sensor which tracks the pencil while it is lifted off the trackpad and the screen moves the cursors without "inking". I don't see it personally happening - I think they will reserve that for the iPad Pro.