What is HTML5?

My super-short post that attempts to answer this question as completely and accurately as possible in three presentation-friendly bullet points.

HTML5 …

• re-imagines HTML as an API ~~with objects, events, interfaces, and methods~~ or a collection of interfaces.
• defines an algorithm for generating a consistent, cross-browser friendly DOM tree, regardless of the quality of the author's markup.
• adds new elements with semantic meaning and multimedia capabilities.