HTML 5 is the next generation of base platform of the web. While it’s still in draft, that didn’t stop a large number of developers and companies to start showcasing some of what the platform offers.
Apple is one of those companies that is very excited about HTML5 and is pushing heavily for wider adoption of the technology. They have produced a showcase of some of the techniques that people should be looking forward to using in HTML5. The reason why Apple likes HTML5 is because it helps cure some of its flash phobias by providing native support for graphics within the HTML framework.