People have been more satisfied with the Xbox 360 than the PS3 so are less inclined to upgrade - one of Yusuf Mehdi's opinions on sales gap

[Dark_Lord_2008]

Settle for selling 50 million consoles over the course of this generation. 30 to 35 million less than XBox 360 sales tally of 83 to 85 million+. Over 5 million sales gap between XB1 and PS4 after only 10 months. Microsoft will fight Wii U for second place and just focus on being profitable.