I am really amazed that Microsoft is now developing Internet Explorer 9 and actually caring to make a good browser! I might switch over from Webkit based browsers and actually go to Internet Explorer 9!
Also, about windows XP:
Lack of supporting Windows XP is not only so that Microsoft can make more money but it is because developing programs (non web based) is really hard to make cross operating system compatible. But, this will help people move on to new operating systems and help software grow quicker.