RSS is not going anywhere. It’s a little overshadowed by Twitter, but there are some major differences. RSS is more organized. I can organize the links in a matter that suits my needs. Twitter can become a bombardment of links. It can become difficult to know what’s going on with Twitter. RSS is not a marketing tool like Twitter. The bombardment of links might include spam.
In my opinion, there will always be people who will need RSS. It comes in very handy for people who like to receive organized information. *coughlibrarianscough*