Thunder Monkey
Banned
If the PS4 is leading by 650K units now, I can easily see the gap expanding back to 1.15M or even more by October. To do so, the PS4 only has to sell a minimum of 500K for the next 7 months, meaning an average of ~71K a month, which should be quite easy IMO. June and September alone could see a gap of >100K between the two consoles due to the release of Batman Arkham Knight and MGS5
My prediction for last year was 1.5 million units in PS4's favor by the holiday season. They were around 200k units short.
So my prediction for this year is 1.8 million units in PS4's favor by Nov. Since they are starting at a higher level this year than they were last.