Resolution in Media Queries
On current mobile browsers, this shorter media-queries work on Webkits (Safari, Chrome, Android, MeeGo/Nokia, Dolphin etc.) and Firefox, Opera
An excerpt from Resolution in Media Queriesand IE9+! (Edit: IE9 does recognize the resolution, however, it may recognize its value wrongly. e.g. Lumia 800 has the screen resolution of 480×800, while CSS pixel width of 320px, but the CSS resolution value is recognized as 96dpi, instead of 144dpi. I need to investigate with other devices also with IE10 when I can! Sorry about the haste conclusion I made earlier!)