Yes, Stockholm is cold beautiful and slippery right now. When you step out of the city center and walk some less frequented paths you might encounter completely ice covered pavements. Stockholm city does not seem to have any money to clear the streets well from ice patches and completely ice covered areas. So look out on you walks, you do not want to spend your holiday in a Swedish hospital where waiting times now are up to between 24-48 hours to get treated when you have smaller injuries that are not life threatening. These long waiting times are partly due to the increased accidents with slippery streets and partly due to influenza and other common winter diseases.