Admittedly, I don't know how they've actually implemented this, but I would imagine that it would be possible for them to render the app on a 320pt "virtual scr

Admittedly, I don't know how they've actually implemented this, but I would imagine that it would be possible for them to render the app on a 320pt "virtual screen", then take that and stretch it appropriately for the actual screen. Otherwise I don't see how they'd maintain true backwards compatibility.