Internet Explorer 9
Microsoft previewed it's IE9 browser at its Professional Developers Conference recently. Most notably is its dramatically increased performance in text and graphics acceleration. It now uses Direct2D instead of GDI. This makes text and graphics animation very smooth and fast with dramatically decreased processor usage.
They do also mention other enhancements such as Javascript speed, but really only focus on the acceleration. In my opinion, they really need a lot of Javascript work.
Check out cnet's interview at http://news.cnet.com/8301-30685_3-10400638-264.html?tag=newsLeadStoriesArea.1.

