Will I be able to get a job without a Marijuana test in the near future?

I mean, thats the only thing they test for that stays in your body more than a few days. Drug testing companies have used Marijuana as a focal point to sell their products and services since drug testing started. Is it possible that small amounts of mariuana will become legal, therefore flipping the balance of these companies onto the truly dangerous drugs? And leaving me, a proud, family feeding, tax paying, hardworking American alone?