HTML5 is a new version of HTML and XHTML. The HTML5 draft specification defines a single language that can be written in HTML and XML. It attempts to solve issues found in previous iterations of HTML and addresses the needs of Web Applications, an area previously not adequately covered by HTML.
Before you continue reading this post, I would like to recommend some of our other articles about this topic, such as 15 Prototyping and Wireframing Tools for Designers, 2 Sets of Basic Icons from PixelMixer or 178 Amazing Web Design Icons from Woofunction.Dont forget to subscribe to our RSS-feed, become our fan on Facebook or follow us on Twitter.
To get a really good idea of how HTML5 is changing the web. This is a great collection of sites that are currently coded in HTML5. You will find alot of new stuff to play around.