If jewelry isn't your thing...here are the things I saw, wanted (and in a couple of cases, bought!) for myself when we were at Disney World T-giving week:
Christmas PJs--they have a variety of designs...my personal choice (Yes, I bought 'em for myself!) were red "Christmas plaid" flannel pants and a green "box knit" pullover shirt w/Mickey & Minnie wearing Christmas outfits) stenciled on the front...I've been wearing 'em (yes, I've washed them!) ever since I got back...SO comfortable, very Christmas-y...I love 'em!
Fleece jackets/pullovers...again, a great selection...I got a red one, w/a very "subtle" Mickey Christmas silhouette embroidered on the left chest area...it's zip-up, w/deep pockets...no hood...again, I love it (and yes, I got this for myself, too!)...they also had pullovers and several different colors (black, navy, forest green, as I recall)
What did I "deny" myself? More than one pair of PJs, and more than one fleece! Aren't I "good?" Grin...
There are, of course, the "usual" assorted really lovely Christmas ornaments (I particularly like this year's "peppermint" style...not as fond of the belted Santa motif, altho I certainly don't dislike it...but wasn't at all tempted by that...)
At MK, in one of the Main St store windows (on the right as you walk towards Cinderella's Castle), there was a porcelain "sculpture" that I will dream about for years...it was a santa's sleigh, on sculpted ice & snow, and it was GORGEOUS! And it was mega-bucks, too...(I don't remember the price, altho I did check...less than $1000, but way more than I was willing to spend, as I recall)...
And LOTS of lovely jewelry!
Or, try Arribas at either Downtown Disney or at the "stall" in front of Germany...some gorgeous "crystal" Disney figures...embossed stemware, etc.
Mickey's Pantry at Downtown Disney also had a year's salary's worth of stuff I'd love...tea sets, bowls, platters...Christmas-y and "other"...great stuff!
Your wife is fortunate to have you looking for these things for her...
Merry Christmas!