Knacki, I am sorry. I guess I mispoke. What I was trying to say is at least in my case that I plan to move away from external hardware hotkey controllers like gamepads and keyboards if possible. With an iPad 12.9" or a Wacom Mobile Studio I have to hold the stylus with my dominant hand and steady/hold the tablet with my nondominant hand. That just leaves my thumb on the nondominant hand and the stylus tip and my index finger on the stylus in the dominant hand available to trigger actions unless there is a voice command or I use a foot mouse or something wearable like the Tap Strap 2.
I would love it if there was for the iPad an app that let you put virtual hotkeys on the screen customizable for each app like Tablet Pro for Windows or the customizable radial stylus menu from Wacom.
Now that there are drivers that allow the 3dConnection Space Navigator 3dmouse to work with ZBrush I am considering buying the wireless one, but that means a more awkward setup for my nondominant hand.