If the affordable care act extends health insurance coverage to 30 million people, how will the current healthcare system be able to meet this demand?

Complex answer: Using the current system & increasing coverage will not work. The new system will have a large primary care base for prevention and early detection of chronic disease & a smaller base for specialist care for the really sick people. Not everyone needs a "cadillac" to maintain good health when a "chevy" or "a bus" can work. Personal responsibility and nauseating profits need to be discussed as well.