PS4 Prototype Controller

This is apparently the prototype of the upcoming PlayStation 4's new controller, there's clear similarities to the current PlayStation 3 controller however it looks obese; almost like a cross between the Xbox 360 and the PS3 controller.  There are also other differences including a speaker, an unknown port (I'm guessing it's an audio port), a new d-pad, a move sensor (<sarcasm>woo - more interactive games </sarcasm>) and a "possible share button".  

Here are the different PlayStation controllers, from PS2 to the PS4 prototype. 

In unrelated news, I just finished BBC's Sherlock series and OH MY GOSH. Can't wait for season 3.

Via IGN