Internet Explorer 10 Preview 2 shows off HTML5 progress

The primary additions to Preview 2 of IE 10 are support for HTML5's web workers and, drag and drop, and the File API. Web workers enable background offloading of javascript, letting scripts run in a separate process to the browser not only improving their performance, but also ensuring that slow scripts don't slow down the browser. Drag and drop uses the HTML5 canvas to allow page elements to be moved around - as the name suggests. Combined with the FileAPI, this makes it possible to drag files from the desktop into a web page. This latter ability is already offered by Chrome, for example, in Gmail so it's good to see IE catching up.