Sony just announced that the PS4 surpassed the 7 million unit mark in sales worldwide as of April 6th,2014. Furthermore, with the release of titles such as inFAMOUS:Second Son, Sony has also released that they have sold more than 20.5 million copies of the PS4’s software through both retailers and the PlayStation Store.
Sony is still gaining momentum after its successful launch back in November 2013 — selling more than 1 million consoles within 24 hours. With the recent success of the Ps4 in sales, there’s no wonder as to why Sony cannot keep shelves of retail stores stocked with the console.
Via PlayStation Blog