I currently have a Macbook 15' 2012 in my signature. I really want a RD Macbook, but not sure whether to get a 15" or 13". I use it almost exclusively for internet, video encoding and photo viewing. Plus it serves as my iTunes media server. I want to see more than I currently can see on screen, but without squinting. So I am leaning towards the 15". When are the new updates due? I bought my current one in August 2012, so was hoping this August would receive an update?