This article is something I've skimmed over so far, and it looks to be a great trick for creating dynamically resizing websites. I've been getting into making these dynamically coded site using Skeleton and it has been an eye-opening experience. Heck, this blogs theme is based on Skeleton. Go ahead, try and resize your browser. The Skeleton framework used media queries to change content based on browser window size. This works great for divs and pictures, but when it comes to text it doesn't play as nicely.
This article addresses that issue by changing the way media queries are done. Skeleton uses a pixel dimension to determine when it should resize everything. Cloudfour on the other hand use em's to check for browser window size, and therefore resize text properly. I need to study this document.