Apple’s new HTML5 page on its site is a showcase for what you can do with the technology. There are seven impressive examples of things you can do using only HTML5: Video, Typography, Gallery, Transitions, Audio, 360, and VR.
Today, Microsoft is making the first developer preview of Internet Explorer (IE) 9 at MIX2010. The developer preview is available for download now. There are lots of demo applications which are built in to test the Speed, HTML5 and Graphics Demos which you can try on the IE9 developer preview edition.