I am afraid that they will play games - they will sell not natural or organic food (to lower cost and increase profit) by changing the definitions and regulations. Their customers will not be able to tell difference.
Also they will ruin some real organic/natural producers by either forcing them of the market or by hooking them on ever lowering price schedule.
Still the true organic/natural stores will survive as their customer base will not give up.
Care to try to define, in scientific terms, exactly what "organic food" is?