you don't need IE10. IE9 is basically the same. IE10 is not going to change the way people's impression. IE will keep declining at same rate regardless IE10. I will spare the details why it fails, they are obvious and still subject to debates.
Loading User Information from Channel 9
Something went wrong getting user information from Channel 9
Loading User Information from MSDN
Something went wrong getting user information from MSDN
Loading Visual Studio Achievements
Something went wrong getting the Visual Studio Achievements