20 million unit difference, and Wii production has ceased. I don't imagine that the Wii will send more than 1 million more units in its lifetime. Can Sony bridge the gap?
Sony sold 12 million units in 2012, and has sold 6 million YTD, with at least another 3 million units to go the remainder of the year (based on estimate of 300k per week for remaining 10 weeks).
That will leave Sony short by at best 17 million units to start 2014.
I can't imagine that Sony will sell more than 9 million PS3's in 2014 (probably much less actually), which on a best case scenario leaves Sony short by 8 million units to start 2015, its 10th and probably final year on the market. I personally don't see how Sony can catch up.
Lifetime Sales Prediction - 6/29/2013
Wii U - 38 million
XBOX One - 88 million
Playstation 4 - 145 million
