Thanks to "budget reconciliation" -- which cannot be filibustered -- Reid doesn't need to change the rules to gain passage of tax legislation.
The so-called "Bush tax cuts" were passed under budget reconciliation, with a simple majority vote, so they can be renewed (or changed) without facing a filibuster.
But tax legislation isn't the end game, it's Supreme Court nominees. So they'll use this little impasse to change the rules and then, down the road, shove a few more Ruth Bader Ginsburgs down our throats.
Bottom line .. we're screwed.