IE9 will run on Windows Vista or Windows 7. The users won't be able to run the beta side by side with Internet Explorer 8 and must instead upgrade their built-in copy of Internet Explorer to the beta to try it out.
IE9 uses hardware acceleration for text and images as well as video and audio. Also IE9 will maintain the option included in IE8 that lets sites that work in an older version of IE render in a compatibility view.
Microsoft officials told that the goal of IE9 is to get out of the way and let the content shine.
By the launch of IE9, Microsoft plans to gain back the share lost in browser market to Mozilla's Firefox and Google's Chrome.