I have been a desktop trackpad user for so long now, I literally don’t want to use a mouse for anything except playing video games. The amount of flexibility offered by a good trackpad just wins most of the time as it is plenty accurate for quickly jumping around on one axis.

With a large enough trackpad, you could even move to a 1:1 type of movement, or add that functionality to a layer for the best of both worlds (like gyro enhanced aiming in games).