HTML5 it's quite very new, some recent browsers don't even support it but most new versions do. Personally I think it has improved very well, with some unique features we didn't have before. I've been reading articles about html5 and I'm looking forward to coding in HTML5 soon when it becomes more popular.
If you have not even heard or read about it, here's a few articles:
- Preview of HTML5
- Yes, You Can Use HTML 5 Today!
- W3C HTML5 Differences
- Preparing for HTML5 with Semantic Class Names
- Accessibility in HTML5
- HTML5 Doctor
- 5 Amazing HTML5 Features to Look Forward to
What do you think about HTML5?