GameAnalyser on 06 December 2012
"However, considering Microsoft used the X from DirectX to title the Xbox (the project name was DirectXbox), and both previous Xboxes have used DX, it’s almost guaranteed the 720 will use DX11. That’s why it’s important to hear that Sony are working on an equivalent API if they plan on competing graphically with whatever Microsoft brings out." http://www.playstationlifestyle.net/2012/12/05/ps4-specs-blowout-gpgpu-directx11-sony-london-set-the-bar-industry-global-illumination-instant-radiosity-more/2/
So it's not Direct X 11, but an equivalent API, which will be built around its architecture.
Anyways , Sony exclusives will always be a visual treat, no matter what hardware. Signature pic below confirms.
