Microsoft is saying they are betting big on RSS in Longhorn and IE 7
1st Throughout Windows RSS enabled
2nd provide a RSS platform that will help expand RSS
3rd Cover more scenarios
Internet Explorer version 7 automatically detects rss and shows a view that people can see the feed in a readable format and it integrates directly with RSS aggregators. They are creating an my feed directory like you have my pictures which will contain all of your feeds that will integrate with all RSS Aggreators.