The big news: Apple has introduced new screen sizes and a new display aspect ratio. The Late 2009 iMac comes in 21.5″ and 27″ sizes, and the displays have the same 16:9 aspect ratio as HDTV (the Early 2009 iMac had 20″ and 24″ 16:10 aspect ratio displays). The smaller iMac has the same 1920 […]