1. Cleaner markup
2. Additional semantics of new elements like <header>, <nav>, and <time>
3. New form input types and attributes that will (and in Opera’s case, do) take the hassle out of scripting forms.
HTML5 introduced many elements such as , instead of to support multimedia.
HTML5 is the latest version of HTML standard supporting multimedia and graphical content.
HTML5 is the proposed next standard for HTML 4.01, XHTML 1.0 and DOM Level 2 HTML. It aims to reduce the need for proprietary plug-in-based rich internet application (RIA) technologies such as Adobe Flash, Microsoft Silver light, Apache Pivot, and Sun JavaFX.