If you have quite a lot of time on your hands and want to listen to one man, the PlayStation 4‘s lead architect Mark Cerny talk about his “Road to the PS4” which he discussed during the Gamelab 2013 presentation in Barcelona, Spain a few days ago.
As I mentioned, you may want to make yourself comfortable because the entire video, which can be seen below, lasts for forty seven minutes. But it is well worth it considering he not only talks about his career in the industry but also information on all four of the Sony consoles that have been released so far.