Prediction: PS4 to sell a minimum of around 70% of its lifetime sells in the first 2 to 3 years in the market.

[Kaizar]

It was "Fusioncode" & "Seece" who said 150 million in the first 30 days:

http://gamrconnect.vgchartz.com/post.php?id=5933493

 

JoeTheBro must be too lazy, I guess.