PS3 sold 5 Million by Sep 07.
PS3 sold 4.1 Million in Oct~Dec 07.
PS4 sold 11.3+ Million by Sep 14. That's 126% more than the PS3's sales!
If we assumed PS4 could maintain 126% higher sales than PS3 then PS4 would sell over 9 million by end of year and pass 20 Million!
I don't really expect that, but I expect PS4 to sell ~50% over PS3, or about 6.2 million which will let it pass 17 million.








