This resonates with something I was thinking too. Basically everyone who has had a web experience hooked up to their 1080p TV has been screwed for a long time. Basically an '800px' layout has sucked for at least 5 years now on both 1920 x 1200 monitors and the aforementioned HD setup. There is no 'Retina' war, there is only web design stuck between the same rock and the same hard place. I feel for them but your tool box has to account for that.