Bill Pugliano/Getty ImagesTwitter's controversial timeline change is officially rolling out on Wednesday, and the most noteworthy thing about it is how unremarkable it is. Twitter users who decide to turn on the new feature starting Wednesday will find an extra batch of tweets sitting at the top of their timelines, showcasing important tweets they might have missed while they had lunch or went to the bathroom. In other words, it's basically a revamped version of the "While You Were Away" feature that Twitter introduced last year. Twitter's plans to change its timeline caused a kerfuffle last week after BuzzFeed reported that the social networking service planned to use algorithms to select and arrange the tweets that users see, a big change from the traditional reverse chronological stream of tweets that has long defined Twitter.