If Obamacare proceeds there will be total chaos. Millions will loose health insurance as employers drop coverage and private health care insurance companies go out of business, but there will not be any viable health care exchanges or expanded Medicaid for those loosing coverage. Rather than addressing the problem of the uninsured, Obamacare will make the problem worse.
IMO, that was the intent of the design all along - put private insurers out of business to usher in single payer, government run social medicine.