Over the years, there have been dozens of serious attempts at reinventing bookmarks (from third-party services and plugins), and none of them have caught on.
My conclusion is that they're just not a concept that works for people; they got squeezed out by web search on one side and complex note-taking applications on the other.
I think there’s room for better bookmarks, but they have to be a part of the browser proper… third party apps and even browser extensions can never be integrated to the required extent, but none of the big browser makers have iterated in this space at all.
