I would very much like for the Apple pen that my lovely wife owns to be usable on Apple Trackpads. It would be wonderful if it was usable on the fixed TP that is installed on the MBP, and it would be fantastic if it was also usable on the peripheral TP’s on those days I’m feeling squirrley and a little bit rebellious. Sometimes I feel like a nut, and sometimes I don’t. I for one, hold no interest whatsoever in a touch screen on a MBP, but wouldn’t this be a nice usage for the Apple pen and a fine example of optimization in unison with the newfangled touch bar? Any rumors of this ever cross the wires?