Some people say that if you deduct the DVD function from the success of the PS2, the success of the PS4 would be higher than that of the PS2. So even if the PS4 doesn't reach 155 million units, the success of the PS4 alone could be more valuable as a standalone console. I think there's something real about it.
Thats like saying Xbox360 only reached 85m+ units because of ~30m Red Rings of Deaths, killing the console.
The Xbox One, might not be down compaired to the Xb360 if you deduct all the sales from RRoD.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071