Microsoft's been doing the talking, Sony is doing the walking. PlayStation 3 is the console for those that value choice. From a standard three-pronged power chord to a standard hard drive bay, Sony's hardware is compatible with a vast range of products, including additional operating systems (e.g., Linux).
Already own a USB headset? What about a web cam? As Microsoft forces us to buy into -- often inferior -- proprietary devices, Sony welcomes us to use those peripherals we might already have lying around. Bravo!