FWIW, I'd think of touch as being an extension/addition to keyboard/mouse (not a replacement).
Zooming and scrolling are really intuitive using touch (familiar due to smart phones)
Regarding presets, I don't think Touch will have an impact either way.
Presets are great for templates...
But each scenario is unique
Think about AmpSim plugin presets. If someone creates a distorted preset using a Tele with single coils, it likely won't sound "right" when applied to a Les Paul. The starting points are radically different.