Here's hoping 2013 marks the year that developments in web technology slow down!
Short of a Mayan armegeddon (oh wait, we already survived that), I don't think there's much chance of the web ever slowing down.
At the moment I am learning SASS and COMPASS. Easy to learn and implement, especially using SCOUT. Great features for SPRITES, RWD and more. I finish up with a compressed CSS file.