There's a great article in today's Slate which warns those who applaud the SCOTUS decision that Chief Justice Roberts has just laid the foundation to gut the Commerce Clause in the Constitution. Obama Wins the Battle, Roberts Wins the War.
The central premise is that majority opinion may have affirmed the constitutionality of the individual mandate, but by doing so within the narrow and limited context of saying the mandate is akin to a tax and Congress has the right to impose taxes, the decision actually lays the foundation for the conservative court members to have constitutional justification to strike down a host of other legislation under provisions of the Commerce Clause, as well as the necessary-and-proper clause.
"This was a test case for the long-standing—but previously fringe—campaign to rewrite Congress' regulatory powers under the Commerce Clause...The business about "new and potentially vast" authority is a fig leaf. This is a substantial rollback of Congress' regulatory powers, and the chief justice knows it. It is what Roberts has been pursuing ever since he signed up with the Federalist Society."
It's a slightly different take on the analysis I've read so far from other pundits, legal scholars and bloggers. Worth a read.