The new IE supports CSS3 features such as rounded corners and opacity, while also now supporting SVG even though Microsoft is pushing its own Silverlight platform for rich graphics. At a conference in Las Vegas where IE9 was demoed, Microsoft showed H.264 video running at 720p in the browser, with the support for the video and audio content built-in.
The new Chakra Javascript engine compiles in the background on a separate CPU core if it is available on the machine. Microsoft is also including hardware acceleration into the browser to speed up web page rendering. The company calls it "GPU-powered-HTML5" which will greatly improve graphics performance within a browser and improve more normal tasks such as scrolling web pages by handing over processing to the graphics card.