Well, the passholder section on the web site mentions all the places with the 20% discount expiring on 12/23. They also continue to show the larger list of places with 10% discounts, including many of those not owned by Disney, with no mention of them expiring. And unlike the old days, all but a handful are good all day and every day, or nearly so.
I would assume that the places currently showing 20% will revert to 10% as of Sunday. For the most part, this means that for passholders, the spending threshold for TiW to pay for itself has roughly doubled.