Didn't get what u meant there.
Currently whenever a new post or topic is made people who are on the Recent Posts page get a notification that a new topic or post has been made along with a prompt to refresh the page, after which the newly made topic/post is also visible on the list of recent posts.
However, the post previews on the homepage automatically update when a new post is made; it would be nice if the Recent Posts page could also do this.
unread attribute to unread posts on the Recent Posts page would allow you to style them accordingly with CSS. If new posts are to be loaded in automatically as proposed in the above paragraph, this would also allow you to make them stand out more, to avoid the user missing the fact that new posts have been made.