While details may be lacking, the structure of the conferences planned for Mix’07 gives a few hints. Improvements in RSS, CSS, and AJAX support are all being given high priority. It is also widely speculated that IE 8 will include support for microformats, small tags embedded in HTML code that can be interpreted in various ways by software, such as calendar events or contact information. Microformat support is scheduled for Firefox 3, so IE 8 will have to include them in order to keep up.
I know there are many out there who swear by IE7, but I am looking forward to seeing what Microsoft plans to do with the next version. I can’t stand using the current version because of it’s clunkiness and nag-factor.
Source: Ars Technica