Straight up, Hillary Clinton won tonight, and don't let the expectations-talk fool you.
As I explain over at Robert Emmet, the talking heads are taking the wrong approach to viewing Mrs. Clinton's Pennsylvania win: The only way she gets the nomination is by way of a historic Obama collapse. So as a practical matter her strategy is to hang around to see if it happens (while trying to abet it, of course).
So in that regard, a win's a win's a win. She lives to wait another day (or two weeks, as the case may be).