in 12 months, selling 16 million... thats a possibility however it depends on how much of system seller Move will be and GT5 and i dont actually know any other Sony exclusives this year that could sell systems, will have to look into that.
PS3 sold 12'404'802, Jan 4th 2009 to Jan 2nd 2010, then it could get very close to 50 million, probably about 4 million away if it repeats last years sales, which i think this year will be very slightly better as the Slim will be out all year instead of just half the year so if it sells between 13 - 14 million this FY then it could be as close as 2 million away so yes it realistically could just about reach 50 million depending on the games and success of Move.
End of 2014 Hardware Predictions (03/03/14)
PlayStation 4: 12-15million
Xbox One: 7-10 million
Wii U: 8-9 million (Changed 01/04/2014 from 7-9 --> 8-9 million)
