Gimmicky, as always with Apple. The restrictions applied to Metal dev and licencing, as always with Apple, will make most devs not care about it. Then is it that relevant on a mobile?
Not sure, look at the game already on iOS using the full power of the iPhone: Infinity Blade. That's about it, most other games are 2D, use casual devkits like Unity or their own like Gameloft in-house engine.







