This article http://www.economist.com/node/21524889 covers some of it.

"Health spending will rise by 5.8% each year from 2010 to the end of 2020, according to actuaries at the Centres for Medicare and Medicaid Services (CMS). In 2020 health care will account for one-fifth of America’s economy."

The article goes on to point out that surveys suggest that the Federal government will be liable for a huge amount of medical obligations... and all this will occur in the country which has the most expensive healthcare in the world.

Something has to break.