Prediction: Uncharted 4: The Fall into Oblivion will outsell Zelda: Real Horses Don't Run Into Trees Very Often

[UltimateGamer1982]

PS4 should be around 30-36 million by the holidays next year.
However, if it does reach 20 million by new years as some are predicting it will, then Sony could easily be at 36-40 million.