In fairness, the DS' CPU runs at only 67MHz (DSi: 133) and has access to only 4MB RAM (DSi: 16MB); the GPU pales in comparison to the iPhone's. We're talking ar

In fairness, the DS' CPU runs at only 67MHz (DSi: 133) and has access to only 4MB RAM (DSi: 16MB); the GPU pales in comparison to the iPhone's. We're talking around an order of magnitude difference; the physical dimensions are also larger than an iPhone although it's hard to say if the extra space is mostly taken up by the second screen and the hinge mechanism. The PSP is somewhat larger than an iPhone and also less powerful. I also suspect the iPhone has been optimised for standby and audio playback battery consumption, not necessarily for max CPU/GPU utilisation and active screen.