You guys do realize that the resolution of a game has less to do with the CPU processing power than say, the GPU's ability to render pixels?
For those of you who may not fully grasp what the CPU and GPU of your console (outdated computer
) does let me give you a very brief and general overview.
The CPU generally keeps track of the location of objects in game-space (where the player, enemies, and building, etc are). It also handles a big chunk of the game physics. The GPU is responsible for taking the location data from the CPU and DRAWING it on the screen as little colored dots called pixels.
Remember that the video played back on screen is made up of a series of images called FRAMES being played back in rapid succession. Generally, the faster these frames are played back per second (frames per second or FPS), the smoother the gameplay looks and feels. 30FPS is the generally accepted minimum framerate for games.
Memory (specifically RAM used by the video card or VRAM) is used to store the image that will be displayed on screen before it is actually displayed. It also keeps track of texture and image data that is used to paint the objects on the scene.
So I hope by now you realize that it is the GPU that is stressed more than the CPU when scaling up the resolution. Let me give you some raw numbers. Remember, the final product of the GPU - no matter what it has to do in terms of calculations - is drawing an array of pixels on a screen. The more pixels it has to draw, the more work it has to do. At 720p (1280x720) the GPU has to draw 921,600 pixels on the screen 30 times per second for smooth gameplay. At 1080p (1920x1080) the GPU has to draw 2,073,600 pixels (over twice as many pixels as it had to at 720p). The GPU has to do roughly twice as much work to draw the same image at a higher resolution. So while the PS3 may have a very powerful CPU, it doesn't have the graphics processing power required to render pixels. If you look at the raw calculations that the PS3's CPU can do, it's a quite impressive 184 GFLOPS (gigaFLOPS or one billion floating-point operations per second). 184 GFLOPS is certainly very impressive for a CPU, but in terms of GPUs like the aging 8800GTS, which can do ~ 480GFLOPS, or the newer radeon 4850, which can do an incredible 1.12 TeraFLOPS, its not much.
Crysis is a very GPU-intensive game (and I suspect Crysis 2 will also be a very GPU and shader-heavy game), so you can bet with almost 100% certainty that it will NOT be running at 1080p on the PS3. I would be impressed to see it running at 720p native.