Well, I hope it's being done securely. I don't know much about the particulars of Android's iOS, but having a low-level language with access to the whole OS (which is what a real user would want for mobile programming, really) could be dangerous for native security.
On the other hand, if Google or Apple backed a high-level scripting language like Python, that could also lead to security concerns, but I would feel safer with that than something like C on my mobile device.
