Just to clarify things : Sony america bought a huge and expensive headquarter, that's the reason why they sold the other little one : http://www.playstationlifestyle.net/2013/09/11/playstation-opens-giant-headquarters-in-silicon-valley-jack-tretton-this-was-the-jewel-we-had-our-eye-on-for-about-6-years/
They also buy a new big headquarter for Santa Monica : http://blog.us.playstation.com/2014/01/29/santa-monica-studio-update-new-site-new-hq/
Dont see only what you want to see...
Predictions for end of 2014 HW sales:
PS4: 17m XB1: 10m WiiU: 10m Vita: 10m