That's extremely unlikely. Certainly not in the near future, sorry.
The effort of such a port would be huge, the outcome uncertain (would it perform and be usable at all on such a limited device without mouse or keyboard) and finally the market would be rather limited.
I'm somewhat surprised that you could imagine creating and editing drawings with a finger on a small touch screen. I can see how iPads can be useful for viewing content but not for creating or editing content. Maybe I'm wrong..