The image below was posted by Microsoft's Russian PR site, though the post has since been pulled from the server and now returns a 404 error is of the new user interface of Internet Explorer 9. The screenshot show off "new" IE9 icon in the taskbar. MJFoley has found following:
Tabs can be "torn off", and possibly "snapped" via Windows 7's Aero Snap feature; Dragging a "pin" from address bar creates a link on your taskbar; There's a combined search and address bar (as with Google's Chrome); IE9 only has one menu, consolidating the six menus found in IE8.
Although suggested sites appears to be missing, along with a few other icons we've been used to seeing along the top of an IE browser window, there still appears to be home, favorites and settings buttons in the top right-hand corner of the window.