> You could potential improve the engine in some way and use up that headroom That is a headroom of a factor of 5.25. If you use that headroom to implement bet

> You could potential improve the engine in some way and use up that headroom That is a headroom of a factor of 5.25. If you use that headroom to implement better graphics, your performance characteristics will likely change completely. That's the point. A thousand vs. a million FPS when you draw a single unshaded triangle doesn't necessarily interpolate to predict the performance in a real scenario.