The Vita's problem is it really lacks unique experiences, and once the whole remote play shit works out with the PS4 it'll have EVEN less. ( Why buy Killzone Mercenary when I can play shadowfall via remote play, why buy dragons crown on it when I can get it cross buy or through remote play)
See Sony's bread and butter is software sales, otherwise the PS Vita will become a true PSP successor, where Sony's games do terribly on it. Because they're watered down console experiences.