15/hr, you'd be making 15/hr, as they have to pay you at least minimum wage. So yes, it would have an effect, but not the one you would expect. You might expect to start making minimum wage of 15/hr and you would until they found a way to get rid of you. The companies do NOT want to pay 15/hr.
I think the point the original poster was making was that if the min. wage does go up that high, they companies will just speed up their attempts to get all of the work overseas.