It is not the Sony fault it is 3rd party fault they make any effort in psvita at least Sony release 2 good vita exclusivity Soul Sacrifice and Gravity Rush.
Monster Hunter is in every console even in the dead console xbox360 expect psvita it didn`t even have a spin off like psp get,the first fifa game in vita sold well but EA made a inferior version of Fifa 2013,Assasin Creed and Call of dutty sold well in vita but vita didn't get another one .
PS4 - over 100 millions let's say 120m
Xbox One - 70m
Wii U - 25m
Vita - 15m if it will not get Final Fantasy Kingdoms Heart and Monster Hunter 20m otherwise
3DS - 80m







