I believe ObamaCare is unconstitutional. I'll bet Chief Justice Roberts thinks it's unconstitutional, too. It's just that it's unconstitutional on grounds that were not the basis of the legal action that was brought in this specific case.
I predict it's going to be declared unconstitutional (if it even survives that long) on other grounds in a future court case that will be brought after more and more of the provisions of ObamaCare are implemented. The constitutionality of these provisions were never argued in this case because most of them haven't even been implemented yet.
I also predict that Chief Justice John Roberts is going to write the majority opinion in the case overturning ObamaCare. Yesterday's ruling brought him a whole lot of credibility to do this, I'd say.