Ridiculous prediction. If Wii U sells 3 mil it'll be a huge success; if Vita sells 4 mil all year it'll be a monumental failure. There's no way BOTH will happen.
PSV will easily sell 4 mil, guaranteed. 5 mil is a safe bet. 6 mil is likely. Wii U will sell 2 mil if it catches on. It'll sell 3 mil if it's an enormous marketing success. 4 mil is out of the question.
9 mil holiday sales for 3DS is borderline insanity. I say borderline because the DS did manage to exceed that amount at least once in '08, but still, it barely broke 7 mil in '06. I think 7 mil would be terrific for 3DS this holiday. 8 mil is a stretch goal. 9 mil.... just stop.