As I said. I would buy it and I would probably turn it into a hosted service if I were you as you probably need the cloud to do some of the computation?
Anyway. If anything else I think it would have a future as a plugin or service. And for a lot of novice music enthusiasts it would be a great little ipad/tablet app.
However, we thought we would need much more work to make a real product, and we stopped working on it.
I'm really considering making a webapp for a simpler use case as you suggest.
Make a webapp at least, allow me to export some useful format for logic.
Then you can work on other ways to use the voice to inform the sounds and other things. As I said. Think about it like VocoderMidi instrument/sequenzer. Something really useful can come out of that IMO.