IOS Apps Demonstrated Running on BlackBerry PlayBook

Due to the complexity and breadth of the iOS APIs, I have my doubts that this is a reimplementation, especially one completed by one developer.<p>If that's not the case, this would be technically feasible, but of dubious legality.

How much longer until he gets a cease and desist from apple? (Or is emulation legal?)

I'm buying myself a Playbook. They're on clearance everywhere (more so than they already were) now that they're being discontinued.