I have recently been thinking a lot about watching high def content on laptops and so decided to once again read the excellent post by NicolasB on Optimum screen size/viewing distance which can be found at http://www.avforums.com/forums/showthread.php?t=312431 I downloaded the excel spreadsheet and typed in a viewing distance of 2 feet and found that a 15.4" display would be ideal for watching 1080p content which just so happens to be a common laptop display size. It's quite strange at first to think that you'll actually resolve more detail sitting close to a laptop than when sitting 8-10 feet away from a 42" screen but there you go. Now my question is not whether I'll notice the resolution of high def dvd's etc on a laptop (seems pretty clear from the above thread that I would) but rather what effect pixel density has on the ability to scale SD content. Just from subjective experience I have found that normal dvd's tend to look a lot better on high density computer screens than when blown up on a large size but low density screens. So was wandering if anyone had any thoughts or info on whether it's easier to scale SD on high or low density displays?