Excerpt from Politifact: (click for entire article)
The health care law turns 2 years old this week, and polls show the public still has a hard time understanding what's in the law. We can understand the confusion: Many of the law’s most biggest features don’t kick in until 2014 and the falsehoods about the law have often drowned out the truths.
Some provisions have started, though: Young adults can stay on their parents’ insurance until age 26. There are new state programs where people with pre-existing conditions can buy insurance. Insurers can no longer put lifetime dollar limits on coverage.