When will PS4, X1 triple the Wii U in sales?

[Dusk]

Kerotan said:

So 2 separate predictions and a poll for one of them.  When if ever do you think the PS4 and x1 will triple the Wii U in total sales?  

 

Firstly the PS4. I estimate the Wii U will hit 12m by the end of 2015.  Could the PS4 hit 36 million and triple it this year?  I'm predicting it does it by first quarter 2016. 

 

X1 is a lot harder to predict.  I'm going to say Q4 2018. Let's have your prediction!  

Starting to doubt they will. The Wii U and X1 are actually up YOY while the PS4 is down YOY. Since that is happening, I'm not sure it will.