As you already know what when IE9 was launched it is downloaded 25 times per second. So it is clear that how many fans are there who still love IE.
IE10 rumor says that it is shipped with windows 8. Some screen shots of windows 8 are also taken. May be windows 10 ships best with IE10. This news is from win7china. The UI of windows 7 is very nice than earlier versions of windows. So lets see how the UI of windows 8 will be and what features the IE10 will have.