it won't happen unless the 3DS is discontinued before the Vita
based on Vita sales that seems hard to believe though... I don't think Vita will be in stores come like 2017 and the NX at earliest will probably be holiday of 2016
the 3DS most certainly will still be available for purchase the next few years
so its extremely unlikely. even if the 3DS was selling like 1/3 or 1/4 on average of what it does in a few years then it beats what the Vita is doing NOW and the reality is the Vita will decrease as well
again, only way for it to happen is if the 3DS is discontinued in like 2017 and Sony decides for some strange reason to continue the Vita past then (which most likely won't happen as they will be losing money on it at that point if sales dip)
