Despite all the political posturing that went on in 2010, Obamacare is one of those national initiatives that is strongly supported by both major parties. In the short term, the primary purpose of the law is to be a boon for insurance companies as they underwrite a flood of new policies. In the long term, the purpose is to eradicate the private insurance industry (after it has already generated huge profits from premiums paid by/for younger people who will file very few claims) and remove a major cost item from the ledger of every major U.S. corporation.
Most doctors do not accept new medicare patients. One doctor I am familiar with who does internal medicine and takes mostly medicare patients told his staff that he wants to increase his patient load from 15/day to 30/day. He expects that Obamacare will be about the same.