Sometimes, despite the large amount of coats I own, I don't want to wear one. You know the times when you know you're going to be inside for more time than you will be outside. When it's cold but not freezing, I like to layer up so that I can remove my layers or just snuggle up inside them without looking like a shapeless sack.
The blanket scarf is genious for these situations. Layer over a vest and long sleeve tee and you practically have a portable blanket situation on your hands at any time.