Such details really create a mood, especially in winter. Snowflakes on the windows look fabulous, and the inscriptions add coziness. I can already imagine how great it looked on yours last year!
I fully support the idea with Christmas window stickers. There are cool snowflakes, inscriptions like Let it Snow, Merry Christmas and even whole scenes with deer and trees. They are easy to stick on, without glue due to static charge, and then just as easy to remove, leaving no traces. The material is pleasant, translucent vinyl, looks neat and expensive, especially against the background of garlands. Light passes through the picture, and in the evening it's simply magic.
I can imagine how cozy it looked, especially in the evening with the warm light from inside. A great idea for those who want to create a magical mood.