IE10 Platform Preview 2, a technical release aimed at web developers, is now available for download.
There are lots of new improvements and implementations of HTML5 and CSS3 like:
- Beautiful and interactive Web applications are easier to deliver with support for several new technologies like CSS3 Positioned Floats, HTML5 Drag-drop, File Reader API, Media Query Listeners and initial support for HTML5 Forms.
- HTML5 Application performance improves across the board, as well as the ability to deliver better performance with more efficient use of battery life with new technologies like Web Workers with Channel Messaging, Async script support, and others.
- Web application security improves using the same markup with support for HTML5 Sandbox for iframe isolation.
You can read the full list here in the IE10 developer guide.