Information can be found in the ISC West thread here.
What about using a wall mounted tablet running the ADC app? will that be a reasonable substitute? Is it possible to ask for a pin when disarming the system from the app?
You cannot require a pin to disarm from the app, but you can require a pin to access the app and remain logged in. It is an option, but secondary panels will be available shortly if you have or are interested in the GC3