Personally, I would probably be
more likely to edit presets if I could directly access a plugin's widgets via touch, quickly going from widget to widget or accessing multiple widgets at once. Granted, my only first-hand experience with touch in this realm in the new Mackie mixer that uses a docked i-pad. It took a few minutes, but once I got semi-used to the finger pressure and movement, it was very nice to control the faders and knobs. And I can imagine it would be that much better on a full-sized monitor.
It's almost 2014, Mike. Things are moving forward whether you like it or not, for better or worse, richer or poorer, and in sickness or health.