CNN, at least, is talking about "the math". If they focus on the math and Clinton fails to make significant delegate gains today, it'll be a blow to the Clintons' "momentum" strategy. (A strategy, btw, that still fails to account for simple arithmetic.)
Markos is right. It doesn't matter if the media perceives Hillary getting "momentum" tonight if she doesn't get enough delegates to catch up with Obama. This is a 50-state election. She lost too many other states by too much of a margin to catch up with Obama's delegate total at this late date. But the media almost seems to feel that they're being unfair by admitting this, so they don't. They talk about Hillary possibly getting her mojo back, but don't bother telling you that it doesn't matter. If she can't get the delegates, she loses. And according to every analysis out there, she can't get them.