I was also just in a Sears and they were still using signwriter computer generated signs based on the stores assortment just like they have for years. Signs are not typically hand printed. The subject of digital radio frequency signing came up at the store I worked in three or four years ago and they said then that it was to expensive. They are in far worse financial shape now. Unless they got some free vendor trial period digital signing for a test store then I don't believe it.