With every new version of iOS comes an onslaught of app updates, and in Twitter for iOS 8's case, that means a totally redesigned (and vaguely Facebook-esque) mobile profile.
Now, when you open someone's Twitter profile on an iPhone (assuming you have iOS 7 or above), you'll be hit with that person's bio, photos, and Favorites first thing, instead of the focus being on follower counts. Below, you can see the old version on the left and the newer iteration on the right.
Along with the new and improved profiles, the Twitter update also takes advantage of iOS 8's new notification center capabilities, so you'll be able to Retweet, favorite, and follow straight from your lock screen. [Twitter]