New Features
Well Some of the most interesting new features have been added in HTML5:
The canvas element for drawing
The video and audio elements for media playback
Better support for local offline storage
New content specific elements, like article, footer, header, nav, section
New form controls, like calendar, date, time, email, url, search
Browser Support
Right now HTML5 is not yet an official standard, and no browsers have full HTML5 support.
But all major browsers (Safari, Chrome, Firefox, Opera, Internet Explorer(from ie 9)
continue to add new HTML5 features to their latest versions.