Hulu might not jump on the increasingly crowded HTML5 video bandwagon anytime soon, but I don't really care because it just added a whole bunch of new features to make Hulu much more awesome.
My favourite, actually, is thumbnail previews along the progress bar, so you can see exactly what you're skimming over when you're skipping around a video. The video player itself is 25 per cent larger with a new native res of 720x404, so 480p video isn't scaled down (much) anymore, and it's chromeless (the controls disappear).
Other new hotness includes adaptive streaming, so it automatically adjusts a video's bitrate to fit your connection - meaning less stuttering and buffering when your connection suddenly starts sucking - and ad volume normalisation, so loud ads won't blow out your ears. There's a lot more, so check out the full photo set of features here.