If you visit Twitter while logged out (on the desktop), you’ll see a new landing page. In an attempt to encourage more users, Twitter ha launched a new homepage that shows you what categories may be of interest to you. Those tabs lead you to a stream of tweets you can peruse, which is the hook. If you’d like to do more — say retweet or reply to a post — you’ll need an account, or to log-in. The page seems geared to encourage more to sign up for the microblogging service.