At the second day of MIX10 Conference Steven Sinofsky President of Windows Division has presented Internet Explorer 9 demonstration and shows the Microsoft commitment towards working on building into its flagship browser. IE9 includes changes at ground level and many new web standards and technologies as new JavaScript engine, HTML5, DOM, and CSS3 and many others are part of it.
Microsoft has provided the IE9 platform preview for developers but this does not include user interface and could not be used for browsing. You may download Internet Explorer 9 Platform Preview from the following link and experience its features.