Hmm. PS4 doesn't have a shot at all at 150 million without Japan. PS2 sold 23 million there while PS4 can probably hope for 9, just shy of PS3. Plus PS2 held the world outside of the major markets exclusively, selling 25 million in them, which it can no longer hope to do while facing competition (which it still is).
I think it can just crack 100 if the market is still favorable in the coming years, just like PS1's 102.5 million. If Xbox puts up a valid fight I think we'll see a 90-70 split at time of death. And of course WiiU maxes any possibility at 25-30 (come on, I wish).








