Well this is interesting. I'm not sure if this is the correct forum for this, but the Pod's deal with these types of tweaks and adjustments.
The first piece of software that I remember approaching modeling in this manner was the original Revalver, before being purchased by Peavey. I wonder if Line 6 will go more in this direction enabling the swapping of tubes and transformers.
It's fascinating what is being done with IOS and other mobile platforms, especially at such low consumer cost. Allegedly, this is going on the market for around $20.00.
It will be interesting to hear the audio and tone quality with this software connected to a PA, studio monitors or directly into an amp.