After the Wii U overtakes the Vita next year will it be able to stay ahead?

[Darwinianevolution]

If the WiiU keeps selling more, it might overtake the Via by the time Zelda U comes and then gain a million units of advantage. After that, it's just a matter of whether Sony keeps the Vita around or not. If the Vita stays a year or two after the NX release, it will come on top.