Hardly, the Vita is already $200, if it comes down to $150 it's very good value - compared to stuff like a 3DS or an iTouch or even the overpriced controller accessories for your smartphone/tablet.
Where are you seeing them for $200? Amazon wants $250, over $300 for the 3g bundles. Anyway my point stands if people wanted to play portable games on a small low rez screen, they would already be buying them. The Vita makes the wiiu sales look pretty good.