extraterrestrialicious web apps

Title says it all really, and this post is more for my future self than anything else. So what is new in HTML5?

Here are some of my faves: video and audio tags, context menus and the sections are pretty nice. I can see myself using header, footer, article and nav pretty much in every website. The progress meter element is awesome, as are the new form inputs: datetime, date, month, week, time, number, email and url. Finally!!