Not sure if Microsoft did it on purpose, but Windows8Beta has found a hidden message in IE 9 itself which hints that there will be an auto upgrade mechanism will be added to IE 9 so it can upgrade to IE 10 automatically which is supposed to rollout with Windows 8
Get the most from the web. Upgrade from Internet Explorer 9 to Internet Explorer 10 for a fast, clean, and more trusted web browsing experience.
If this holds true then IE fans have another thing to joy about. The latest release of IE version 9 is not only smooth but much faster than its predecessors at many places though there are features like above still missing. Via NeoWin