UE4 “Zen Garden” using Metal API for iOS 8 revealed at WWDC

, i loved the demo you gave for Metal, it was very interesting and inspiring to see just what you guys have accomplished in such a short time with UE4 overall.

Are there any major reason for licensed iOS developers not being able to get a pre-public build with Metal? Is it because you cannot validate who is a developer without breaking the current SDK NDA?