If you thought yesterday’s Facebook changes were dramatic, you’d better sit down before you see what’s coming next. Today at F8, Mark Zuckerberg led off by showing off Timeline: it’s the future of Facebook, and it’s a tectonic shift. Timeline Zuck calls the new Timeline “all the stories, all your apps, a new way to express who you are.” The story of your life. Your entire Facebook life has been condensed into a wider one-page destination. Taking a page from the About.me site, the page-wide Cover photo is your new splash photo on your profile page. The large photo does not replace your profile pic. Zuck says it’s a way to express who you are. All content is in your Timeline view now, including apps. As you move down your Timeline, it condenses your story the further back you go….