RSS Feeds are my gateway to the internet; with more than a thousand feeds in my reader, I navigate the daily news via RSS headlines. However, in discussing my habit with less tech savvy friends, the buzzkill for them seems to be the organization required to make sense of such a deluge of information. I have multiple readers, and everything is tagged, sorted, filtered. Also people tend to want, yes, PICTURES, with their news. These are issues that have to be addressed with readers before RSS can be popular.
I noticed while studying the data for the Firefox open data competition that bookmarking is surprisingly rare, and it's no secret that Delicious is going down. This was also news to me, we thousands of bookmarks, but again, the information is only functional because of my scrupulous tagging and formatting. It seems people are going for one stop news at sites they can navigate easily with visuals- an intuitive RSS feeder perhaps drawing from browser history might fit the bill for some. We can't expect browser developers to support features that aren't being used: a leaner browser is better, and customization is an easy option.