The touchpad on the front is a bad idea, because you have to take your thumbs/fingers off of buttons to use it.
It should be on the back, split into two parts right where the metal plate is on the back of the DS3. If you look at the back of a well-used PS3 controller, the metal plate will have worn down in two spots. This is where the pad(s) should go.
This way, you're using fingers that are just sitting there, and you get actual functionality out of it.
That PS4 controller is a mock up. If their is a touch pad on the controller, it will be on the back of the controller. Also, it says Dualshock 5 on the top. And Sony wouldn't make a controller with asymmetrical analog sticks.
I came here to chew bubblegum and kick ass. And I'm all out of ass. I'm out of gum too. I guess I'll just sit here.