It couldn't hurt...well, except for the temporary soreness that comes from exercise, that is.
Bear in mind that in order to have "six-pack abs" you will have to have an absurdly low body fat percentage. Most of the models with those abs naturally have very little body fat, so your mileage (or inchage) may vary.
The cardio workout will be excellent for burning fat and increasing your metabolism, and may in fact do more to help you achieve your goal than the Ab King ever could.
