This appears to be a Destiny character profile for the player character "halcylon" being displayed on an iPhone emulator.

halcylon has 1790 of something-- perhaps a rank or accrued experience.

Across the bottom of the screen appear to be some RPG-like player attributes-- energy, shields, agility and discipline.

The icons on the left appear to be weapons, indicating that Destiny may increase the number of weapon slots from Halo's 2 to a slightly more robust three. Each weapon appears to be of a distinct type, which may indicate a weapon slot system similar to Mass Effect's, where the player can choose one example from an array of weapon variations, one per type. The displayed weapons might be a pistol, shotgun, and SMG.

The icons on the right may be armor or other pieces of equipment.