If you were to go by the numbers... Nokia Lumia 800: 3.7 inch screen @ 800px by 480px = 252.15 ppi Nokia N9: 3.9 inch screen @ 854px by 480px = 251.19 ppi 1 extra pixel per inch in favor of the Lumia 800. I'm quite sure it makes all the difference, but there's a very slight advantage in regards to pixel per inch; which relates directly to the OP statements of why Nokia should use the 325ppi or so (less for the New iPad) "Retina" type screen. Not taking up for anybody. Just stating the facts.