" PS4 is easier to develop for than PC and built around the Share button "

[TheJimbo1234]

Turkish said:

“For The Witness we’re mostly interested in the base machine and how fast it is – the fact it has faster RAM than a PC, which really helps in shuttling graphics resources around, and since it’s not running a heavyweight operating system like Windows that gets in the way of your graphics,” he told us. “Rendering stuff through Windows has an impact on performance. Since a console is just about games, that doesn’t happen, and the equivalent game will run faster. And if you can target to specific hardware you can make it run faster, too.”

 

http://www.edge-online.com/news/jonathan-blow-on-the-power-of-ps4-and-how-sharing-will-change-the-way-we-play/

This is the case with every console. A simple OS and the same drivers & hardware means it is very efficient.