I woke up yesterday with these thought.

Blogs will fade away within two years.  What we know now as blogs will not be recognized by web users of tommorrow, not as blogs, but as websites.  Website technologies and blogging technologies will converge into one.  People take it for granted that webpages can be edited using their browser.  People will also take it for granted that any webpages can be subscribed to with a single-click.  Web browsers will be changed to support all this and more like highlighting of changes.