Which will happen 1st? (Wii U vs Vita vs One vs PS4)

[drake_tolu]

1) Wii U passed Vita

2) PS4 double XBOX ONE

3) PS4 double Wii U

4) If happens, XBOX ONE passed Wii U ( and i'm not sure ). But not before of 2016/2017 (maybe 2018)

My prediction for end of this year is:

3DS: 55,000,000

PS4: 16,500,000

WiiU: 10,200,000

PSV: 10,500,000

XOne: 8,000,000