While controllers over the life of the PlayStation brand have generally been the same on the outside, Sony has made some good changes to this iteration of it's controller both inside and out.
The Dualshock Hardware
The DualShock 4 displays the same general layout and buttons as past DualShock controllers, but now the controller offers additional features along with new buttons. The most obvious change is the inclusion of a wide touchpad where the Select and Start button were; those buttons are now replaced with an Options button instead. Sony has mentioned that the touchpad can respond to up to two fingers at a time, which expands the number of possibilities for input to those like you would see on a smartphone. In addition, the DualShock 4 sports a 3.5-mm headphone jack that supports surround sound along with both an accelerometer an