The 10.2 PTR adds many new environmental doodads related to World Events, pointing to ongoing efforts to refresh the in-game holidays. There's also assorted updates to rugs, hunting lodge decor, and siege vehicles, which are seen all across Azeroth.
Some holiday models showing their age.
While these models may seem inconsequential on their own, all together they help keep the world looking fresh--and we recently learned in an GameSpot interview that Game Director Ion Hazzikostas said an old-world revamp was likely to happen.