The PlayStation 4 is an Xbox under a different brand. It has more in common with the original Xbox than with the PlayStation 1 or 2. Also, SONY can model their division in the shape of a donut, It still doesn't change the fact Nintendo has always been their biggest source for inspiration.
What? They were inspired by the way the music division ran and decided to run the game division the same way, making that their primary inspiration. And I asked for an explanation, not for you to just say the same thing without providing any reasoning.