So maybe Clinton wins it by 3 points, or 5, or 8.
Doesn't matter, and the commentators on MSNBC (and probably CNN and Fox, too, but I'm not watching those) understand the subtext pretty well.
Here are the only numbers that matter:
Obama: $42 million cash on hand, $600,000 debts
Clinton: $9 million cash on hand, $10 million debts
You can't keep running a race like this without money. She doesn't have any. She's not getting much momentum out of Pennsylvania tonight, even with a pyrrhic "win."
So maybe she lives on through IN and NC. It's still over.