The second release of a Platform Preview (PP) for Internet Explorer 10 is now available. In this PP2, the IE team has implemented a very big number of new site-ready HTML5 technologies and continued working on improving performance. As a web of front-end developer, you can now download this standalone version, test the features, play with it and give feedback back to Microsoft.
Some of the new technologies include:
Furthermore, Microsoft continues working on experimental standards by providing Prototypes through HTML5 Labs. This is the case for IndexedDB, WebSockets, Media Capture API and FileAPI, which has now been added to IE10 PP2.