I LOVE this.  It's an advertisement from 1949.  Apparently, the Atlantic Theater installed the new "Cycloramic Screen-the magic screen of the future"!  According to information found online, this screen was designed to produce a clearer, more uniform picture.  Unlike other screens, this product had no perforations and featured a "silky smooth" surface that was supposed to reduce eye strain.  It also supposedly created a 3-d like effect, making "every seat in the house a winner"!