As downvoting/disagreeing isn't possible I just wanted to submit a mostly opposite idea to one of the other idea's.
- No seperate buttons (as is the case on macbooks for example and the current xps 13), as this greatly increases the useable trackpad area.
- Two buttons at most (middle mouse button is /rarely used/).
- The bigger the better (trackpads are extremely useful when they get past a certain point where you can start using them as a one on one representation of the screen (rather than a relative moving device) which is incredibly useful in some applications).
- Two finger scrolling (or the circular scrolling which was popular on linux awhile ago) that actually works (I have seen a number of really really poor implementations)