Angry Birds has become the breakout star of the mobile gaming world, thanks mostly to its simple premise and addictive gameplay (though some rather shameless marketing hasn't hurt). But next to the likes of Shadowgun, it can't help but look a little... flat. In a recent press event Nvidia's mobile content vice president Neil Trevett spent some time speculating on Rovio's cash cow, and how the developer might be leveraging more recent mobile gaming technology for better graphics and physics.