prediction: Xb1 will reach 25 mil by the end of 2015.

[NitroCrafter14]

Doubt 25 million as the Xbox One is still perceived as inferior by most, but I could see it getting close with Halo 5.

My predictions are at the end of 2015:

Xbox One: 23 million (total) 12 million (2015)

Playstation 4: 35 million (total) 17 million (2015)

Wii U: 14 million (total) 5 million (2015)