It is not impossible to write a piece of short fiction from the point of view of a shop window, or a Christmas tree, or Ingmar Bergman, but I don't suggest you try it.
A shop window at Christmas, or a Christmas tree in Ingmar Bergman's family home on Fårö or Bergman doing his Christmas shopping with his last wife Ingrid von Rosen, probably buying wooden toys for his grandchildren: any of these things are perfectly legitimate settings for a story about family life or old age or an argument about the nature of truth and happiness. But I would advise against it, not least because it could constitute an act of plagiarism.
