Hmm. No, actually I started wrong, and finished wrong. I knew the APIs had been carried over from OS X, but I thought the underlying kernel was completely different... But no, after investigating a bit, I see that they are running some version of the Mach kernel underneath all that iOS UI messiness.

As such, I suppose they could scale it up fairly easily to have more powerful abilities. I take it back, iOS may, unfortunately, be here to stay...