Microsoft has released IE 10 PP4 yesterday which is available for download now. Do note that this works only on Windows 8 developer preview OS. The highlights first, courtesy MSDN blog:
- Cross-Origin Resource Sharing (CORS) for safe use of XMLHttpRequest across domains.
- File API Writer support for blobBuilder allowing manipulation of large binary objects in script in the browser.
- CSS user-select property to control how end-users select elements in a Web page or application.
- Support for HTML5 video text captioning, including time-code, placement, and captioning file formats.
There is lot more detail and a video showcasing IE10's HTML5 capabilities in this MSDN blog article. Go dig it. And do submit your feedback on Connect.