Too soon to tell, now that the PS4 is out, Vita sales will at least double. And, remember, it is NOT about winning the gen, it is about making a profit.
As long as the Vita makes a good profit on the long run, it will be alright.
I say: not even drop the price, just let the good times roll.
It is like cars, not only the best selling cars turn a profit. Or bands, not only the best selling bands make money. Or restaurants, not only the best places turn good profits.
It is not a freaking race, if they make profit, it is all good.