That's why all the big centralized sites have a huge advantage over the Web. Youtube, Twitter and Co. will send notifications when there is new stuff. My browser won't do the same for the Web. Recommendations are another thing missing on the Web. There is no way to get related websites without the author of the current one putting links on it.
RSS had a bunch of good ideas, but it never had good browser support by default and the need for the website author to create it, limited it's usefulness. I am also not a fan of RSS being basically a copy of the website, not the website itself. Shouldn't good HTML markup be enough to retrieve the information automatically?
Either way, I think we really need to reinvent publishing, bookmarking, searching and cataloging of the Web. Just going back to late 90s style of Web design isn't going to work when SoC optimized sites still bubble to the top and push everything else out of the way.