You read it right - one of the most popular apps on Android, and long-time holo holdout Twitter, has finally updated its look. And it's nice.
The new 4.0 release has an all-new feel, and improved hashtag and mention support in the search and compose windows. You also now tap and hold on tweets to bring up the action menu (reply, retweet, favorite, share). Here's the full changelog from the Play Store: