As Google announced recently on the official Google Reader Blog that it will now be providing detailed subscriber count stats for Feed Publishers. The stats will highlight readers that have subscribed to your feeds through Google Reader or Google Personalized Homepage. In short, a mere free Treat for bloggers 
like us.
Google also plans to introduce more RSS features that shall boost the Google product economy 
The new feature will be useful for Feed Publishers to look at their feed subscribers more dynamically and in a efficient manner. They can seperate the number of feed subscribers who have subscribed through Google Reader or Google Personalized Homepage from other feed subscribers who use other means to fetch the site content.
I must say it shall give Webmasters and Bloggers a new dimension to look at the way People read their site content and shall help them understand the reader psychology 