No, you are not looking at a tiny human! This playable, jumbo-sized DualShock 4 is at the Sony Interactive Entertainment building in Tokyo.
The face buttons and the D-pad work as do the shoulder buttons. The thumbsticks can move around, but aren't playable. (I'm guessing the TouchPad isn't either, because creating a giant version seems expensive.)
It doesn't sound like R2 and L2 work, either. [Image: Gigazine]
Website Gigazine recently checked out the controller and played PaRappa The Rapper on it.
Check out more photos on Gigazine.