Microsoft has announced that Windows 7, Windows 8 and Windows RT will be receiving a new platform update on Tuesday, February 26th, which may be a clue as to the launch date for the final version of Internet Explorer 10 for Windows 7. The Microsoft Support Page has word that there will be a platform update released on that day for Windows 7 and Windows Server 2008 R2. In fact, you can download a pre-release version of that update right now.
The update is supposed to offer "improved features and performance" and is a prerequisite for IE10. The same support page shows that there will also be a software update for Windows 8, Windows RT, and Windows Server 2012 on that day, along with an update roll-up for Windows Server 2012 Essentials. At the moment, the only information on what's included in those updates is that they are supposed to "resolve issues in Windows".